Accutron® A83W Waterproof Crown CN-ACC07 (click here for case references) Open Loop End precision ring mandrels measure ring

precision ring mandrels measure ring size consistently from ring to ring and mandrel to mandrel

the indicator at the 6 o'clock position records up to 60 seconds and the indicator at the 9 o'clock position records up to 60 minutes

14 x 480 (18 3/4")

Generic Crown to fit IWC® CN-IWC005 IWC Portuguese

Genuine Rolex® 59 part 710

Accutron® A83W Waterproof Crown CN-ACC07 (click here for case references) Open Loop End precision ring mandrels measure ringAccutron A83W Waterproof Crown CN ACC07 steel with LOGO, genuine Accutron A83W, outside diameter 4. 00 mm, tube diameter 2. 00 mm, tap 0. 90 mm, height 2. 00 mm, case reference C863001, C863009, C863028, C863040, C865008, 3164, 3165, 3166, 3273, 3343, 7380 * Perrin Supply Ltd is independent of and not affiliated with or sponsored by Accutron. Accutron warranty does not apply to parts supplied by Perrin Supply Ltd. Using generic crystals may devalue