AS 1287

 
AS 1287

AS 1287

Description

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.

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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 train

gear 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 train

side view of the gear train

The center second is directly driven.

base plate

base 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 side

AS 1287 dial side

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

Technical data

Manufacturer:AS
Caliber:1287
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel screw balance
Shock protection(s): Unishock
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel
  • center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Features:SCD
Functions:hour, minute, second
A/h:18000
Size:10 1/2''' (measured: 23,2mm)
Literature: Flume: 1952 4

Usage gallery

Invicta mens' watch

Invicta mens' watch

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