| Mannufacturer | ETA |
| Caliber Number | 2671 |
| Movement Type | Automatic, self-winding mechanical |
| Lignes | 7 3/4”’ |
| Diameter | 17.2mm |
| Height | 4.8mm |
| Jewels | 25 |
| Power Reserve | ~38 hours |
| Vibrations Per Hour | 28,800 vph, 4Hz |
| Shock System | Incabloc |
| Regulator System | Etachron with fine timing device |
| Features | Central hours; central minutes; central sweeping seconds |
| Hacking Seconds? | Yes |
| Country of Manufacture | Switzerland, Swiss made (v8) |
| 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.
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