Omega Calibre 1428 Quartz Movement | ETA 256.041 Reference
Omega calibre 1428 is a compact ladies’ quartz movement from the Flatline III era. Omega’s historical calibre nomenclature identifies the 1428 as an 18.20 mm quartz calibre and records its external base as ETA 256.041. This page is an original Gilded Hour research summary for identification and service planning; it is not an Omega service-manual reproduction.
Omega records calibre 1428 as an ETA 256.041-based movement. Treat this as a documented base-calibre relationship, not proof that every ETA 256.041 is a drop-in replacement for every Omega 1428 case.
Omega 1428 technical specifications
| Documented year | 1986 |
| Documented ETA base | ETA 256.041 |
| Movement family | Flatline III quartz |
| Diameter | 18.20 mm / 8¼ ligne |
| Jewels | 5 or 6 depending on revision; Omega records 6 jewels from 1989 |
| Frequency | 32,768 Hz |
| Display / calendar | Quartz time display with date function in the 256.041 reference family; confirm the fitted Omega variant |
| Battery reference | 315 / Renata R315 / SR716SW family |
Identification and replacement guidance
Omega calibre 1428 and ETA 256.041 share a documented base-calibre relationship, but the Omega movement may carry brand-specific finishing, plates, battery hardware, dial supports, stem specifications or other revision details. Compare the movement marking, diameter, thickness, stem position, hand heights, date-wheel position, dial feet and case clearance before sourcing a replacement.
The ETA 256.041 reference is discontinued and ETA identifies E61.041 as its replacement family. That successor should not be treated as an automatic drop-in substitute without a watchmaker’s dimensional and parts comparison.
Sources and attribution
- Official Omega Museum calibre nomenclature
- ETA 256.041 parts and specification reference
- ETA 256.041 phase-out and E61.041 replacement notice
Omega base-calibre lineage is stated only where the historical Omega nomenclature identifies it. Battery and replacement details are identification leads, not universal fitting instructions. Have the movement confirmed before ordering parts or fitting a replacement.