Made in Zlatoust in the Ural is the Agad 4295A, an 18 1/2 ligne stopwatch movement, which is the russian stopwatch movement and still in production (as of 2021).
It’s display range is between 0.2 seconds and 60 minutes.
With 16 jewels, this movement is of higher quality than most other mechanical stopwatch movements, which were once produced when mechanical stopwatches were relevant.
All bearings of this pillar construction, except those of the mainspring barrel, contain rubies.
Except for the enormous size of the wheels, the gear train is basically the same as on a “normal” watch: The mainspring barrel drives the minute wheel (here located decentrally at 12 o’clock), followd by third wheel, center seconds wheel and the relatively tiny escape wheel made of steel.
This movement uses a swiss type pallet lever escapement. The anular Glucydur balance, which is unfortunatly not yet shock protected, beats with 18000 A/h, which means, that the movement can measure 1/5 second steps.
Besides a moveable hairspring stud, the adjustment of the hairspring length is made by a short regulator arm with an hammered in scale into the balance wheel cock.
The actual chronograph mechanism is located on the dial side.
Center part is the pillar wheel at position 4 o’clock, which works with 12 steps. Each second step, the balance wheel is started with the help of a lever at 6 o’clock, and on each following step, it is stopped. This way, additional measurings are possible.
When the balance wheel is stopped, with the lever at position 1 o’clock, the two chronograph hands can be reset to zero.
|Size:||18 1/2''' (measured: 42,0mm)|
|Number of jewels:||16|
Glucydur anular balance (three legs)|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Short regulator arm|
|Construction type:||pillar construction|