A technical description of No. 7 before continuing the illustration/photograph descriptions (note, all information is attributed to Peyton Autry in his article "The Almost Lost Art of Breguet", unless I use ( ) to insert a comment of my own:
This watch, No. 7, was started in December of 1983 and completed in March of 1987.
The carriage & escapement contain 80 parts. Total weight 1/16th of an ounce. Balance screws are 16K gold. Chronometer rating nuts are Iridium. Balance and detent are stainless steel. The balance spring, passing spring and twin detent springs are in Elinvar. Balance rollers are jeweled. Carriage is heat-treated carbon steel. Carriage rotates in 60 seconds EXACTLY. Carriage counterweight is 22K gold. All nickel parts are Rhodium plated. All ruby parts were made by Clark. Balance jewels are permanently fixed. Cap jewels have oil retention grooves. Hairspring stud is adjustable for holding the spring with no distortion. Adjustment for isochronism is also made on this assembly. The escape wheel is hard brass. Two mainsprings wound by a single (female) geared arbors. Both springs are wound at once using a hand-made matching, numbered gold ratchet key. (Uncommon for any modern tourbillon that I am aware of): the watch has a mechanism that locks the balance such that it cannot flop around when not wound.
Stopworks are located on top of the barrel (below the barrel cock, opposite side as the teeth). The escape wheel potence and center wheel run on the same plane to help slim down the watch. Breguet usually made his movements 62 mm in diameter to give the proportional illusion of the watch being thinner. Clark's movement is 58 mm and 10 mm thick (Basically, Clark was able to make the watch a bit thinner than Breguet's tourbillons, and therefore compensated by reducing its diameter . . . in all giving a smaller watch with the same balanced proportions.)
Gene Clark believed that a tourbillon with a detent should NEVER have a regulator.
Plate gilding was done using the gold cyanide process which gives a better look (so they say . . . hopefully that didn't play a part in his death?)
Clark had to make all the gear cutters himself. He made jigs and fixtures for making the jewels. He made his own rose-engine to turn the dial and the hairspring (I have never heard of a rose-engine being used to make a hairspring? If someone can explain, I'd love to hear.) With this watch, the only thing he didn't make was the mainsprings. (Earlier I said he did, but that must have been on one or all of the other watches?)
Figure 2A and 2B "Two views of the initial Clark One Minute Tourbillon, February 1985. Note the carriage and escape wheel have rotated 90 degrees, equivalent to 15'."
Figure 3 "Variation of Peto's Cross Detent escapement on initial configuration of No. 7 tourbillon."
Figure 4 "Close-up of final balance configuration, February 1986. Note the cut-down balance wheel rim. Gilding, signature, numbers and other parts had not been completed."
Figure 5 "Final basic configuration of Clark Tourbillon, February 1986. Note revised barrels and lighter balance."
Figure 6 "The spring detent tourbillon is characteristically larger than an ordinary pocket watch, yet not large in appearance. Overall cased diameter is 63.5 mm."
Figure 7 "Below tourbillon carriage"
Figure 8 "Engraved area of back cover is sterling silver. Bezels and center are 19K gold."
Figure 9 "Engraved areas of the case band and back cover are sterling silver. Bezels and center, pendant and bow are 19K gold alloyed by Clark"
Figure 10 "Angular perspective of tourbillon. Note carriage is in the locked position
Figure 11 "Inside back cover is signed "Clark No. 7 USA"
Figure 12 "Dial is (silver) whitened then lacquered
Figure 13 "Maker's signature next to the VIII on the dial; USA is engraved next to the III."
(no pics)
Figure 14 "Breguet-style "tipsy" ratchet key. Bottom end winds. Top end sets the hands. Center is a large jewel. "No. 7" is engraved on band."
Figure 15 "Gene Clark at his bench, his tourbillon watch before him."
Note: In References, no books, periodicals, etc. on Gene Clark are included.
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February 1990 NAWCC Bulletin
Back cover: Picture of the tourbillon carriage of "Gene Clark's "No. 4" which is currently in the making. The diameter of the outer gear is 31 mm."
Note: This is the most beautiful tourbillon carriage I have ever seen in my life. The remontoir is incorporated within the carriage.
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April 1992 NAWCC Bulletin
Picture of No. 4 on Front Page with back open showing tourbillon and barrel. Also, chain and ratchet key.
"The Almost Lost Art of Breguet Part II (The Clark Constant Force Tourbillon Watch" by Peyton Autry
(Note: Clark's numbering system is not chronological. No. 7 was completed in 1987 while No. 4 was completed in 1991.)
Derrek Pratt is mentioned as another Breguet-level watchmaker. "We will undoubtedly see and hear more of Derek Pratt in the future." I really haven't heard much about him, does anyone know if there have been any internet articles that show his work? Another Breguet-level watchmaker that I think should get a spot on Tempered is Christian Klings. In a world of watchmaking talent, Christian Klings is definitely near the top.
Okay, on to No. 4:
65mm case with split gold chain and ratchet Breguet-style key.
Whereas Clark estimated No. 7 to have taken him 4,000 hours. No. 4 is estimated at a mind-boggling 9,100 hours.
Single barrel is wound by inserting the male key into the square next to the spring barrel and turning counter-clockwise. The watch is set by placing the female part of the key onto the square on the center wheel cock.
The gear-toothed tourbillon carriage rotates once every 4 minutes. Part of the 4-minute rotation reasoning is that the single barrel would not have been able to store enough energy for a 1 minute tourbillon and still have a reasonable endurance level (36 hours, I think?)
The case back, case band, bezel, pendant and bow are all 18K pink gold -alloyed and rolled by Clark himself.
Unlike No. 7's large Center and Third wheels, the power-train transmission is done through at least 3 smaller wheels.
The Tourbillion cock is a large all brass piece with "No. 4" engraved in script on it.
The major wheel cock is also brass and has the name "Clark" engraved in script on it.
The barrel cock has "USA" engraved in script on it.
The watch has an Up/Down indicator (the same style as Daniels and Smith)
The Hour hand has an arrow at the end while the Minute hand is a simple tapered straight hand. (Except for the seconds hand, the hands are Daniels hands . . . one more proof of who a major influence on Clark was while he was making the tourbillon watches).
There is a moonphase indicator above the hour/minute track (which is small and centered down and to the left. The up/down indicator is very attractive in it's location to the right in the largely 'empty' right side of the dial.
The dial is whitened silver.
Everything in the case is made of rolled stock, no castings. "The use of rolled stock makes for a very tough, springy case. While you would think the case is a simple affair to make, it was actually extremely difficult because it is so large and requires many solders each melting at a lower temperature than the last. If too much heat is applied, you will simply melt the area that has already been soldered.
(Note: I highly recommend the DVD about Martin Matthews. He is an English, 4th generation case maker who uses basically all 18th century tools and technology. Just Google his name and you will find a place to buy it from. While it is never said, my guess is that George Daniels learned what he knows about case making from Martin Matthews. It is well worth the money.)
There are lots of beautiful pictures of the tourbillon, but how I long for super-high resolution pictures so that you can get "inside" it because it is so complex I find it hard to fully understand how it works.
The remontoir entire cycle of cocking and releasing the constant force spring and impulse is done in a few hundredths of a second.
"When you see its jeweled perfection in motion under a loupe, one is well nigh overcome by the ingenuity of its human creation."
A quote from Gene Clark on the making of No. 4:
"The were, of course, many problems with it, as any such thing would have. The biggest problems were the speed of some of the components - some must be very rapid, and some must be very fast for a time, and then fall off in speed near the end of their function. And example is the cocking of the escapement. It would tend to cock perfectly, but so fast the primary detent did not have time to fall and catch the constant force lever. To overcome this, I had to use a slightly different form on the cocking wheel teeth, and also re-design the cocking jewel in the constant force lever. This allows it to cock in exactly the same way, but holds the constant force lever in the cocked position a tiny bit longer so the primary detent has a bit more time to fall safely. This whole thing could be accomplished by tightening the up the primary detent spring a bit, but this would change the force necessary for unlocking, which is very desirable, so I had to use this method to slow the components down.
The case was also a bit of a difficult job, as it is large, and so much soldering there was always a great danger of warpage, and much of it is with a very high temperature solder. Everything in the case is rolled, no castings. I rolled the gold from my own alloy. The use of rolled stock makes for a tough, springy case. A case is, of course, a very simple affair, but they do take a lot of time to make.
I personally made everything in the watch with the following exceptions. Lynton McKenzie did the engraving. Sergio Brecher in New Jersey supplied the glass for the case - a fine craftsman whose work I greatly appreciate. I fitted a Swiss-made hairspring to it, but did not actually make the spring itself. I ended up making the mainspring myself, drawing it from round wire" - Gene Clark
When asked him to identify what the prime requisites of a world class watchmaker. He first replied that, "A bit of insanity can be very comforting at times! A good library is necessary, not only on watchmaking and repairing, but also on fine watches and tools. Also, 'machinery' is rather important, but the most important things are patience and experience. Without patience and experience, one cannot make a decent piece, but with patience and experience one can improve his work with each piece. Every watch, and every piece of a watch must be better than the last one. The desire to improve has to be the most important aspect of all. In this day and age those bits of simple advice, given the thought they deserve, have a depth of wisdom any aspiring maker of the Breguet arts must either be considered, and do -- or should cast aside those his aspirations." - Gene Clark
In my opinion (for whatever that's worth), No. 7's tourbillon with its insanely complex constant force escapement is the greatest tourbillon ever made and surpasses any tourbillon watch George Daniels has ever made! If F.P. Journe, Roger Smith, Christian Klings, (enter name here) make "Corvette Tourbillons", No. 7's tourbillon is an "Enzo Ferrari tourbillon"
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January 1998 Horological Times - Front Cover features #5.
"A One Minute Tourbillon By Gene Clark" by Ron DeCorte
No. 5 was completed in 1994 at a cost of approximately 2,000 hours.
Once again, everything except hairspring was made by Gene Clark.
18K pink gold case measuring 52 mm across.
Most tourbillons are driven by the 3rd wheel and thus the tourbillon carriage is considered the "4th wheel" (which is why a seconds indicator is often incorporated into the carriage which while rotating, if there is a 60 division ring on the dial, it will function the same way a hand attached to a 4th wheel is used to measure seconds.)
"In this watch, however, there is a standard 4th wheel the carries the second hand and the tourbillon carriage is driven directly by the 4th wheel at a 1:1 ratio. This arrangement requires less power than normal . . . a much weaker mainspring can be used." This allows for a longer spring to be used, and therefore increases the length the spring can be used giving this watch at least a 56 hour running time while still maintaining a steady amplitude. "The acceleration and deceleration of the tourbillon cage, five times per second, is also more controlled."
"A complicated stopping (hacking) device is employed that stops the seconds hand exactly on the second. This allows very precise synchronization of the watch to a master time signal."
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Sotheby's Dec. 8, 2006 Auction in New York
Sold No. 5 for a pathetic $54,000 (including buyer's fees). For the 2,000 hours of labour, Gene Clark earned $27 (assuming after taxes). That doe not take into account the capital investment (i.e. gold, silver, etc.)
I bet your average production employee at ETA earns more than $27 per hour. An employee who's skills required are pick up part out of blue bin, move part into the fixture of a machine, close all safety shields, push button, remove part and throw it into green bin which means its ready to move to the next station.
Also at that same sale, Gene Clark No. 1 was also sold.
No. 1 is a 35 mm case 18K gold Pink Gold Minute Repeating Wristwatch.
While he did not make every single piece of this watch, he certainly made more parts than ANY maker such as Patek Philippe, A. Lange & Söhne, Breguet or AP do when they purchase an ebauche. He probably made all the jewels my hand, alloyed and made his own case without a $500,000 CNC machine, and made the dial and hands himself.
To prove the effort, this is what Gene Clark said about this watch. "I will never do another wrist repeater again."
His effort brought a winning bid of $32,400. Considering the hours and investment, I'm sure he would have made more money working at a factory job over the same amount of time that it took to make that watch.
To wrap it up: Gene Clark (1948-2006)
No. 1 - 35mm Pink Gold Minute Repeater Wristwatch
No. 2 - Unknown*
No. 3 - Unknown*
No. 4 - Tourbillon Watch w/ Remontoir- Greatest Tourbillon Ever Made
No 5 - Tourbillon w/ 4th Wheel
No 6 - Unknown*
No 7 - Tourbillon w/ Carriage Latch For When Watch Is Powered Down
*The chronograph that Clark reworked with the addition of 61 (every friction point) hand made by him was never identified in the information I have.
During this search I discovered that No. 4 and No. 7 were auctioned and I do not, as of yet, have those catalogues.
