| Brand | ETA |
| Caliber Number | 2671 |
| Movement Type | Automatic |
| Size | 7 3/4”’ (17.20mm overall diameter x 4.80mm height) |
| Jewels | 25 |
| Power Reserve | 38 hours |
| Vibrations Per Hour | 28,800, 4Hz |
| Shock System | Incabloc |
| Regulator System | Etachron with fine timing device |
| Features | Hours, minutes, seconds |
| Hacking Seconds | Yes |
| Country of Manufacture | Switzerland |
| Known Models | Hamilton Face to Face (H32856705) |
This ETA caliber 2671 was found in a Hamilton Jazzmaster Face2Face watch which has dual automatic movements. Because of the double movement design, small movements were necessary. The small size is a notable feature of the 2671.