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.
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.
main plate
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.
dial side without date indication
On the dial side, you see the yoke winding system, the Diafix-bearings and
the spares for the date indication mechanism.
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.
dial side view
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.
Technical data
Manufacturer
Orient
Caliber
G11
Number of jewels
21
Escapement
Anchor with pallets
Balance
Glucydur
Shock protection(s)
Diashock (Seiko)
Balance cock direction
centered (bridge)
Hairspring stud
moveable
Regulator type
Hairspring key
Movement construction
Fork Escapement wheel, Fourth wheel, Third wheel, Mainspring barrel Center wheel
