Sonceboz ES 55
The diameter is 11 1/4 lignes and it beats with 21600 A/h. The balance runs in two
shock protection systems with three legs; on the movement side with a jewel, on the dial
side only with a steel plate. The balance drives a pin lever, the center second hand is
directly driven while the cannon pinion is driven indirectly by the mainspring barrel.
Manufacturer Sonceboz Caliber ES 55 Number of jewels 1 Escapement pin lever Balance Nickel Shock protection(s) Brac Dip Resomatic Balance cock direction clockwise Hairspring stud moveable Regulator type Hairspring key Movement construction Fork
Escapement wheel, Fourth wheel, Third wheel, Large driving wheel
Winding mechanism yoke Setting lever spring 1 holes Features SCD Functions Hour, minute, second Beats per hour 21600 Size 113/4''' Production time 1978 - ? Factsheet