Longines® Waterproof Crown CN-LONG56 thin square, flush pipe, diameter 4.00 mm clock nuts 17-340 has a ring size

17-340 has a ring size 3"x 9/16"-3/4"

Omega® 635

45 mm (hour/min

The Retrograde indicator at the 6 o'clock position is a "Dual Time" Retrograde

thickness 0

Longines® Waterproof Crown CN-LONG56 thin square, flush pipe, diameter 4.00 mm clock nuts 17-340 has a ring sizeLongines Waterproof Crown CN LONG56 thin square, flush pipe, diameter 4. 00 mm steel, thin square, flush pipe with wings and name logo, diameter 4. 00 mm, height of crown only 1. 85 mm, total height of crown 1. 85 mm, opening diameter to tube crown fits 2. 00 mm, tap 0. 90 mm * Perrin Supply Ltd is independent of and not affiliated with or sponsored by Longines. Longines warranty does not apply to parts supplied by Perrin Supply Ltd. Using generic