Everybody knowns the selfwinding movements from Förster which were mass-produces. Manual wind movement for gents' watch were much less common, but tiny ladies' form movement are almost unknown.
The Förster 630 described here belogs to this species and was launched around 1960. It is a typical 5 1/4 ladies' watch form movement with pallet lever and 17 jewels.
On the base plate you see, that all important bearings are equipped with rubies, except for the minute wheel and mainspring barrel.
The gear train of the Förster 630 is a very common one, with directly driven minute wheel and a tiny second wheel. The shape of the movement allows a large mainspring barrel and a rather large balance wheel. Both count for better precision and enhanced running time.
The screw balance is unfortunately not shock protected and beats contemporarily slow with 18000 A/h. It regulates a conventional pallet lever movement of swiss type.
This movement can only be identified on the dial side, and the hallmark looks pretty crude.
The Förster 630 has got a rocking bar winding system. The click mechanism is on the dial side and consists of a well made ratched and a spring, which is hooked onto it.
|Size:||5 1/4''' (measured: 12,7 x 19,2mm)|
|Number of jewels:||17|
Nickel screw balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Hairspring key|
|Construction type:||solid construction|
|Winding mechanism:||rocking bar winding system|
|Setting lever spring:||1 hole(s)|
Flume: 1962 29|