Longines Ultra-Chron
High-beat 36,000vph chronometer line launched 1968, revived 2022.
2 references
| Reference | Variant | Years | Dial | Size |
|---|---|---|---|---|
| 7970 | Ultra-Chron Diver, original 1968 production | 1968–1974 | black | 41 mm |
| L2.836.4.52.6 | Ultra-Chron Diver Re-edition, Steel Bracelet | 2022 | matte black, grained / red | 43 mm |