Longines L153 Movement Technical Reference | ETA 976.001 & SR616SW

The Longines L153 is a compact two-hand quartz movement found across a number of vintage Longines ladies’ watches. The L153.2 designation appears in related Gilded Hour catalogue records. This page separates the documented movement cross-reference from watch-specific battery and application details.

Technical snapshot

Longines designation L153; related catalogue designation L153.2
Documented base cross-reference ETA 976.001
Display Hours and minutes
Dimensions 13.00 × 15.15 × 1.95 mm
Jewels 6
Battery reference Renata 321 / 321 LD / SR616SW; verify the fitted cell and battery cover before replacement
Electrical supply 1.55 V silver-oxide cell in the ETA service data

Service and parts notes

ETA service information identifies the circuit distance piece, stator, rotor, transmission wheel, intermediate wheel, stop lever, battery insulator, minute wheel, setting wheel and positive battery clamp as service components. The service communication gives a coil-resistance test of 2.10–2.40 kΩ with the module removed and insulation greater than 1.00 MΩ, tested at 20–25 °C.

These are watchmaker reference points, not instructions for untrained work. A battery change should include inspection for leakage, corrosion, damaged insulation and a secure battery clamp.

Battery and interchange caution

Most L153 records in the connected Gilded Hour catalogue show SR616SW, while one L153 listing records SR621SW. That discrepancy is retained here rather than silently normalised. The movement engraving, battery well and cover should control the final replacement decision. L153, L153.2 and L153.6 should not be treated as automatically interchangeable without checking dimensions, stem, hand heights and circuit layout.

Longines watches recorded with this calibre

Sources and attribution

Gilded Hour archive note: This is an original research summary prepared for The Gilded Hour. It is not a reproduction of a Longines or ETA service manual. Calibre names, battery references and replacement suitability must be checked against the movement actually fitted to the watch.