Longines 431
Technical data
| Manufacturer: | Longines |
| Caliber: | 431 |
| Size: | 11 1/2''' |
| A/h: | 36000 |
| lift angle: | 52° |
| Number of jewels: | 25 |
| Escapement: | Pallet lever |
| Balance types: | Glucydur anular balance |
| Shock protection(s): | KIF Ultraflex |
| Balance bearing / direction hairspring: | Clockwise |
| Moveable stud: | yes |
| Adjust mechanism: | Excenter |
| Features: |
|
| Production period: | 1967 - ? |
| References: | Flume: K3 214 |
| Mentioning in literature (years): | 1968 |