26.60 mm x 24.00 mm F-shape, flat mineral crystal, Timex® REF 23-327902, fits: 1975 Timex® M-23 Cavatina Models: 51270, 51280, 1974 Timex® M-23 Cavatina Models: 51270, 51280
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Timex®. Timex® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.