A Lange & Sohne
For terms of usages TPD database click here
| MODEL, DESCRIPTION | MOVEMENT / CALIBER | WINDING DIRECTION | TURNS PER DAY (TPD) |
| 1815 Automatik (2004) | 921.2 Sax-O-Mat | Both | 500 |
| Anniversary Langematik | L921.7 Sax-O-Mat | Both | 500 |
| Grand Langematik | Sax-O-Mat | Both | 500 |
| Langematik | 921.4 | Both | 500 |
| Langematik with date | L922.1 Sax-O-Mat | Both | 500 |
| Langematik without date | Sax-O-Mat | Both | 500 |
| Langematik Perpetual | L922.1 Sax-O-Mat | Both | 500 |
If you could not find your watch model (or caliber) in this table, you may determine your A. LANGE & SOEHNE 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.