The Orient G11 shown here is an elaborate handwinding movement, which probably bases on a Seiko movement.
The speciality of this movement is, that escapement wheel, fourth wheel and third wheel are all beared in ruby bearings with cap jewels. These Diafix bearings are made by Seiko.
An additional speciality is, that the balance wheel is beared under a balance brigde and not, as common, under a balance cock.Video on YouTube
The construction of this movement is conventional: The minute wheel is beared on both ends under an own bridge, the rest, escapement wheel, center second wheel (directly driven) and third wheel are all below one large bridge, as well, as the mainspring barrel.
The large ring balance with its two slanted legs (probably Glucydir?) runs in two Seiko-Diashock shock protecting bearings under the balance bridge. It oscillates with slow 18000 A/h.
The hairspring is connected to a moveable hairspring stud and can be regulated in its effective length on the hairspring key only.
On the dial side, you see the yoke winding system, the Diafix-bearings and the spares for the date indication mechanism.
The date indication mechanism is not repair-friendly with lots of small springs (with superb flying capabilites) - the only real weak point of this otherweise very well made movement.
As you can see here, this movement was abused a lot - even the dial was glued onto it!
As the overall condition of this movement is very poor, it’s not tested on the timegrapher, since the results wouldn’t be representative at all.
|Size:||11 1/2''' (measured: 25,2mm)|
|Number of jewels:||21|
Glucydur anular balance|
|Balance bearing / direction hairspring:||Bridge|
|Adjust mechanism:||Hairspring key|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||3 hole(s)|