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AS 1287

AS 1287AS 1287


The AS 1287 is a typical, well made swiss hand wound movement, which debuted in the late 1940ies. It's direct relative is the AS 1187, which only differes by a taller and more angeled gear bride.



The screw balance is beared in two shock protection systems. On the specimen shown here, they are Unishock bearings. The Balance beats slowly with 18000 A/h.

gear traingear train

The gear train with its center minute wheel, located under an own bridge, was state of the art at that time.

side view of the gear trainside view of the gear train

The center second is directly driven.

base platebase plate

The AS 1287 uses rubies on all important bearings. On the specimen shown here, there are also three additional cap jewels, two for the escapement wheel and one on the dial side of the third wheel. On this position, a cap jewel is almost overkill, since the third wheel turns pretty slow and with big force, and additionally, since the dial side of a watch is normally on top, the axle won't even touch that cap jewel.

AS 1287 dial sideAS 1287 dial side

Of course, the AS 1287 uses a yoke winding system.


 Technical data

Number of jewels17
EscapementAnchor with pallets
BalanceNickel screw balance
Shock protection(s)Unishock
Balance cock directioncounterclockwise
Hairspring studfixed
Regulator typeLong regulator arm
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel
Center wheel
Mainspring barrel
Construction typesolid construction
Bridge shapeAxe, handle right, bulfe left, 3 gears
Winding mechanismyoke
Setting lever spring2 holes
FunctionsHour, minute, second
Beats per hour18000
Size101/2''' (measured: 23,2 mm)
Image in Flume Werksucher 1952 4
AS 1287ASAS128710 1/2''''''AS 128717 Jewels, 10 1/2'''''', 18000 A/h, SCD



Usage gallery

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