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AS 1717

 
AS 1717
AS 1717
 

Description

The AS 1717, which debuted around 1963, was one of the most flat self-winding movements of its time. When a height of only 4mm, it was perfect for being used in the ultra-modern ultra flat gold watches of the sixties.

movement view without rotor
movement view without rotor


Such a small height was possible, since the whole self-winding mechanisms was integrated as a module into the movement and not put as an additional plate onto it.

selfwinding mechanism
self-winding mechanism


The self-winding module used here is a simple construction: The rotor drives a gear (not shown here), which drives the ratchet wheel. This wheel guarantees, in addition with a click spring, that the rotor only winds in one direction and is decoupled when the movement is hand wound.

The self-winding module can be removed by releasing only two screws and uses a whole of seven jewels wherever possible.


selfwinding mechanism, flipped over
selfwinding mechanism, flipped over


AS experimented in the sixties with different self-winding systems and wanted to find out whether a bidirectional winding rotor was superiors to an unidirectional winding rotor.

Since all later AS self-winding movements were unidirectional winding ones, it seems, as if this combination was not only cheaper and more reliable, but as more or at least as effective as a bidirectional winding system.


movement view without selfwinding mechanism
movement view without self-winding mechanism


The rest of the movement also was very modern for its time - it already uses a decentral minute wheel which indirectly drives the center minute hand and is beared in two synthetic rubies.

This construction allowed the usage of a very large balance and of a very large mainspring barrel - both guarantee (together with the Glucydur balance and the blue Nivarox hairspring of the specimen shown here) best precision results.

The center second hand is directly driven and the hairspring stud is moveable. The effective length of the hairspring is regulated by a short regulator arm.

date indication mechanism
date indication mechanism


The AS 1717 uses an instantly switching date indication which can be corrected semi-fast by turning the hands back and forth.

The date mechanism, as common on AS movements, is very elaborate:
The date wheel at "6" drives a hammer mechanism at "7" and creates tension there. At midnight, the tension is released immediately and advances the date ring.

Technical data

Manufacturer AS
Caliber 1717
Number of jewels 25
Escapement Anchor with pallets
Balance Glucydur
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,QG,RDR,AUT
Functions Hour, minute, second, day, self-winding
Beats per hour 18000
Size 111/2'''
Production time 1964(1963)-19??
Image in Flume Werksucher  K3 183

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