Omega® Crown (Waterproof, with split post attached), yellow, total length 5.65 mm

Omega® Crown (Waterproof, with split post attached), yellow, total length 5.65 mm

Omega® Yellow Waterproof Crown with female post attached, square, diameter 3.70 mm, fits tube 2.00 mm, total length 5.65 mm. Case numbers are unknown

* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Omega®. Omega® warranty does not apply to parts supplied by H. & W. Perrin Company Limited. Using generic parts may devalue your watch.