AS 1717
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| AS 1717 |
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Description
The AS 1717, which debuted around 1963, was one of the most flat selfwinding 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.
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| movement view without rotor |
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Such a small height was possible, since the whole selfwinding mechanismus was
integrated as a module into the movement and not put as an additional plate onto it.
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| selfwinding mechanism |
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The selfwinding 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 selfwinding module can be removed by releasing only two srews and uses a whole of seven
jewels wherever possible.
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| selfwinding mechanism, flipped over |
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AS experimented in the sixties with different selfwinding systems and wanted to find
out whether a bidirectional winding rotor was superios to an unidirectional winding rotor.
Since all later AS selfwinding 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.
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| movement view without selfwinding mechanism |
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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.
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| date indication mechanism |
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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 immideatly and advances the date ring.
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| dial side view |
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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, selfwinding |
| Beats per hour | 18000 |
| Size | 111/2''' |
| Production time | 1964(1963)-19?? |
| Image in Flume Werksucher | K3 183 |
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| Factsheet |
Usage gallery
