Omega Calibre 1351 Quartz Movement
Omega calibre 1351 is a compact round quartz movement documented from 1978. It measures 17.20 mm across, is 3.35 mm high, uses a 32,768 Hz quartz resonator and has 2 jewels. Omega’s historical nomenclature associates the calibre with both men’s and women’s De Ville watches.
The specified battery is a 1.55 V low drain silver oxide 362 / SR721SW, approximately 7.9 mm × 2.1 mm. This is a different battery family from the 364 / SR621SW used by calibre 1350.
Omega 1351 technical specifications
| Year | 1978 |
| Diameter | 17.20 mm |
| Height | 3.35 mm |
| Jewels | 2 |
| Quartz frequency | 32,768 Hz |
| Battery | 362 / SR721SW |
| Omega service battery ref | 1447010 |
| Service accuracy | −9 / +15 seconds per month |
| Motor impulses | 1 per minute |
| Coil resistance | Approximately 1.5 kΩ |
| Consumption | 0.80 µA |
| Lower working voltage | 1.25 V |
| Battery life service reference | Approximately 48 months |
| Historical application | De Ville, men’s and women’s |
| Historical production | 60,200 pieces |
Does Omega 1351 have an ETA equivalent?
No direct ETA equivalent is identified in Omega’s calibre nomenclature for 1351. It should not be assigned an ETA number simply because other Omega quartz movements of the period used external bases.
Omega 1351 compared with 1350
The 1351 belongs to the same early compact quartz period as the 1350, but it is not the same movement in another shape. The 1350 is a 13.00 × 15.15 mm rectangular calibre using a 364 / SR621SW; the 1351 is a 17.20 mm round calibre using a 362 / SR721SW. Both have 2 jewels and a 3.35 mm height.
History and identification
Omega dates calibre 1351 to 1978 and associates it with both men’s and women’s De Ville watches. The historical production record is 60,200 pieces, substantially lower than the 1350. Calibre identity should be confirmed from the movement or model specific documentation before ordering parts or attempting substitution.
Omega factory service reference
Omega factory spare parts and service reference for calibre 1351. This is a parts and service sheet rather than a full overhaul manual.
Open Omega 1351 parts & service sheetFAQ
362 / SR721SW, 1.55 V low drain silver oxide.
No. 1350 uses 364 / SR621SW; 1351 uses 362 / SR721SW.
Omega’s historical nomenclature associates it with De Ville watches for both men and women.
No direct ETA base is identified by Omega for calibre 1351.
Battery and service figures are taken from Omega workshop data, with historical production and application details identified separately. No ETA lineage is inferred where Omega does not document it.