Compare Studio
6138-8020 vs 6138-0011
Differences are highlighted. Rows where both references share a value are dimmed.
| Specification | ||
|---|---|---|
| Nickname | Panda | UFO |
| Production | 1972–1978 | 1970–1979 |
| Era | Round-case two-register | Lugless 'Yachtsman' case |
| Status | discontinued | discontinued |
| Case diameter | 40mm | — |
| Case material | Stainless steel or gold-tone plated | Stainless steel |
| Construction | Round case with conventional lugs | Lugless round case with an integrated bracelet mount, giving the appearance of no lugs at all |
| Bezel | — | Internal rotating bezel |
| Crystal | Hardlex | Hardlex |
| Crown | Crown at 3; pushers at 2 and 4 | Crown at 4; chronograph pushers at 2 and 4 |
| Dial | Ivory (steel) or black (gold-tone) | Blue, green or grey depending on variant |
| Lume | Tritium | Tritium |
| Movement | Automatic chronograph | Automatic chronograph |
| Caliber | 6138B | 6138B |
| Manufacturer | Seiko | Seiko |
| Winding | automatic | automatic |
| Frequency | 21,600 vph | 21,600 vph |
| Complications | Chronograph (30-minute and 12-hour totalisers), day-date | Chronograph (30-minute and 12-hour totalisers), day-date |
Compare 6138-8020 with another generation