Omega® Crown (Waterproof, Tap 1.20 mm), calibres: 420, steel
Omega® Steel Waterproof Crown to fit Omega® caliber 420, diameter 5.00 mm to fit tube 2.00 mm, Tap 1.20 mm, domed top. 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.