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MONTANA winding parameters
Definitions:
- «CW» - Clockwise winding direction;
- «CCW» - Counterclockwise winding direction;
- «Both» - Combined mode (Clockwise + Counterclockwise);
- «–» - Undefined;
| MODEL, DESCRIPTION | MOVEMENT / CALIBER | WINDING DIRECTION | TURNS PER DAY (TPD) |
|---|---|---|---|
| 1925 Series | ETA 2895-1 or 2895-2 | Both | 650 |
| 1930 Series | ETA 2895-2 | Both | 650 |
| BAN-1 | ETA 2824 | Both | 650 |
| BAN-2 | ETA 2895 | Both | 650 |
| BAN-3 | ETA 2892-A2 | Both | 650 |
| BFW-1 | ETA 2824-2 | Both | 650 |
| BFW-2 | ETA 2824-2 | Both | 650 |
| BFW-3 | ETA 2824-2 | Both | 650 |
| BFW-4 | ETA 2824-2 | Both | 650 |
| Bridger Field Watch | Both | 650 | |
| Officers Watch | ETA 2892-A2 | Both | 650 |
| SAP-1 | ETA 2000 | CW | 650-800 |
| SAP-2 | ETA 2000 | CW | 650-800 |
| SAP-3 | ETA 2000 | CW | 650-800 |
| SAP-4 | ETA 2000 | CW | 650-800 |
If you could not find your watch model (or caliber) in this table, you may determine your MONTANA winding mode on a trial basis. You should select the combined winding mode (CW+CCW) and the minimal number of turns per day (TPD). Then place your watch into the winder and check after a few days how accurate your watch shows the time. If it runs behind, it is necessary to increase the number of TPD by one step.
