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This is a high‑quality generic steel crown for the Breitling Superocean Chronograph II reference A13340, measuring 7.5mm with an M1.2 thread. Crafted from premium stainless steel, it ensures smooth manual winding, secure stem engagement, and precise time‑setting.
Material & Finish: High‑quality stainless steel (316L), finely polished – corrosion‑resistant and wear‑resistant.
Dimensions: 7.5mm diameter, M1.2 thread (metric fine thread) – fits the case tube of the Breitling A13340.
Function: Manual winding (clockwise), time‑setting (pull to second position), and date quick‑set (first position, movement‑dependent).
Compatible model: Breitling Superocean Chronograph II A13340 (44mm case, Breitling Caliber 13 automatic chronograph).
Q1: How does M1.2 thread relate to common Tap 10?
A: M1.2 is a metric thread with a nominal diameter of 1.2mm. Tap 10 is a watchmaking term for 0.9mm thread. They are different. Confirm your stem thread specification – measure the original crown with calipers.
Q2: Can I install without threadlocker?
A: Not recommended. The crown is subjected to vibration during screwing/unscrewing. Low‑strength threadlocker prevents loosening while allowing future removal.
Q3: The crown does not feel sealed when screwed down. What should I do?
A: Possible causes: ① O‑ring aged or incorrect size; ② Crown tube threads damaged; ③ Crown not fully tightened. Inspect the O‑ring. If threads are damaged, professional repair or tube replacement is needed.
Fast Worldwide Shipping – Orders ship within 3 business days
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Trusted by Professionals – Used by watchmakers and repair centers worldwide
Personalized Sourcing – Need a matching tube or different crown size?
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