AS 1780
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| AS 1780 |
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Description
A rather late, but a little bit unusual constructed movement is this 8 3/4 ligne ladies'
movement of AS. You can clearly see the rationalization influences of the sixties. Technically it
resembles very well the state-of-the-art of that time: The large nickel ring balance beats with
21600A/h and in beared in Incabloc shock protection systems. The hairspring stud is moveable, the
hairspring regulator has got no arm.
This movement uses an excentrical located minute wheel (on the movement side at "5", on the dial
side at "7"), which drives the hands indirectly. This kind of construction allows larger balances
and mainsprings on smaller movements, which influence the daily rates and run time in a positiveway.
Unfortunately, on the specimen shown here, the connection beween the minute wheel and the hands
has become lose over the time, so that the hands are no longer driven.
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| dial side view |
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Technical data
| Manufacturer | AS |
| Caliber | 1780 |
| Number of jewels | 17 |
| Escapement | Anchor with pallets |
| Balance | Nickel |
| Shock protection(s) | Incabloc |
| Balance cock direction | clockwise |
| Hairspring stud | moveable |
| Regulator type | Hairspring key |
| Movement construction | Fork
Escapement wheel, Fourth wheel, Third wheel, Large driving wheel
Mainspring barrel |
| Features | SCD |
| Functions | Hour, minute, second |
| Beats per hour | 21600 |
| Size | 83/4''' |
| Image in Flume Werksucher | K3 11 |
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| Factsheet |
Usage gallery
