| Brand | Longines |
| Caliber Number | L704.2 |
| Base Caliber | ETA A07.171 |
| 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 | Longines Master Collection 42 24H / Longines Admiral GMT / Longines Military 1938 24H / Longines Avigation / Longines Conquest GMT |
The Longines caliber L704.2 is based on the ETA caliber A07.171 Valgranges. It is a Swiss made automatic watch movement with 24 jewels and a GMT complication.
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