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I had a 21j sub rep, and the beat was noticeably slower than a breitling super ocean rep that I had purchased. Is the 21j slower than the real thing?
31 jewels @28,800 bph
Oh ok, sometimes people dont list the jewels or bph, so are there specific movements that I should look for that have those specs?
there are low beat and high beat movements. 21j 2813 low beat , 21j 4813 high beat.