Rechargeable battery capacitor TS920E
The old MT920 has been discontinued and is now replaced by the SII TS920E battery (newest version)
This capacitor/battery is designed ONLY TO WORK SEIKO watch movements listed below
Compatible Movement List
V172
V174
V175
V176
VS72
VS75
VX33
Compatible Watch Model List
Seiko SSC012
Seiko SSC015
Seiko SSC017
Seiko SSC021
...and some other Seiko Coutura series watches