No technical information found for this movement.
Watches with the W921 movement
| W921-4000 |
| W921-400A |
| W921-400B |
| W921-400C |
| W921-4010 |
| W921-401A |
| W921-401B |
| W921-4020 |
| W921-402A |
| W921-402B |
| W921-402C |
| W921-402D |
| W921-4030 |
| W921-403A |
| W921-403B |
| W921-4080 |
| W921-408A |
| W921-4120 |
| W921-4130 |
| W921-413A |
| W921-4140 |