| Brand | ETA |
| Caliber Number | A07.171 Valgranges |
| Movement Type | Automatic |
| Linges | 16.5”’ |
| Diameter |
36.6mm |
| Height |
7.9mm thick |
| Jewels | 24 |
| Power Reserve | 46 hours |
| Vibrations Per Hour | 28,800, 4Hz |
| Shock System | Incabloc |
| Regulator |
ETACHRON |
| Rotor Style |
Ball-bearing |
| Rotor Winding |
Uni-directional |
| Hacking Seconds? |
Yes |
| Hand-Windable? |
Yes |
| Features | Central hours, central minutes, central sweeping seconds, central GMT hand (second time zone), quickset date at 3:00 |
| Country of Manufacture | Switzerland |
| Known Models | Invicta 12878 |
The ETA caliber A07.171 is a Swiss made automatic watch movement with 24 jewels. This movement is capable of displaying a second time zone thanks to the centrally located GMT hand. This caliber is based on the ETA 7750 framework and began production in 2006.
Other variations of the A07 family of movements include:
- A07.111 calibre: hours, minutes, seconds, date
- A07.161 calibre: hours minutes, seconds, date, power reserve
- A07.211 calibre: hours, minutes, seconds, date, chronograph
- A07.171 calibre: hours, minutes, seconds, date, 24-hour hand
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