Double Axis Tourbillon
In the 1970s, an Englishman named Anthony G. Randall created a double axis tourbillon for clocks—more as an intellectual exercise than to actually address the issues of rate deviation mentioned above. He built a carriage clock based on these principles, adding the double axis tourbillon.
In a double axis tourbillon, the second axis revolves parallel to the dial, influencing the rate positively when the watch or clock is positioned with the dial up or down. Thus, this mechanism has an advantageous influence on the rate of all six positions.
Since the double axis tourbillon can only realize its full potential in wearable watches, Thomas Prescher first examined his possibilities in a pocket watch so that the feasibility of his vision could be examined and later added to a wristwatch version. It turned out that directly miniaturizing the same arrangement of components was not possible. Problems concerning weight distribution, gearing, and friction of the micro mechanisms led to completely different reactions than in Randall’s clock since the smallest component of the new mechanism weighed a mere 0.0009 grams. The tourbillon had to be designed entirely new, most especially because Prescher wanted to create a flying tourbillon Version.
Technical Details
Special features
· Flying tourbillon construction on both axes
· Movement, Caliber TP 3W6A.2, designed and constructed in-house
· First double axis tourbillon wristwatch with constant force mechanism in the carriage
· Tourbillon is secured in a specially designed flexible spring to absorb shocks
01
Movement Information
Diameter
Height
Number of components
Weight of smallest screw used
Number of jewels
Frequency
Number of spring barrels
Plates and bridges
Balance wheel
Balance spring
Power reserve
Number of subdials
Functions
37 x 37 mm
5.43 mm
279
0.0009 grams
37
21,600 beats per hour (3 Hz)
two
gold-plated brass, hand-engraved with Guilloché Triangulair
copper-beryllium CuBe2
flat hairspring
40 hours
two
hours, minutes, seconds
03
Distribution of Bearing Jewels (First Axis)
First axis
Balance
Escapement
Constant force mechanism
Axis
Second axis
Flying arm
Movement
Time indication system
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5
4
4
2
2
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10
02
Tourbillon
Number of axes:
Height of tourbillon rotation
Revolution time:
Constant force mechanism
System of constant force
Constant force reloading
Diameter of balance wheel
Diameter of cage
Tourbillon weight first axis
Weight of first and second axes
two
12.2 mm
one minute
on first axis in tourbillon cage
inertia acceleration according to Jaenneret
6 times per second
9.5 mm
13.4 mm
0.347 grams
0.766 grams
04
Case Details
Case
Crystal
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Dial
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Height
Water resistance
Strap
Buckle
platinum 950 or 18-karat gold
convex sapphire crystal on front and back, anti-reflective on both sides, hand-engraved with individual number​
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1.2 mm solid silver, hand guilloché with Guilloché Triangulair
18-karat gold applied indexes
18-karat gold dauphine-style hands
18-karat gold hand-engraved name and number plate
12.3 mm
1 ATM (10 meters)
hand-cut and –sewn black alligator skin uppers and lowers
platinum 950 or 18-karat gold
