30.90 mm outside diameter, low profile plastic crystal, 28.50 mm opening diameter of the inside ring, white ring, minute track(black) and radium dots (Mido® colour 11-R), original vintage Mido® crystal
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Mido®. Mido® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.