![]() Construction of the C series is same as B series, but using new parts. 7S26C / 7S36C are replacement caliber of Cal. The difference between B/C in Seiko’s own words: According to the change, we would like you to pay attention to the design of the balance staff when repairing those watches.” -Source: Seiko Parts Catalogue/Technical Guide Cal. 7S watches are changed from caliber “A” to caliber “B” in October 2006 production. The difference between A/B in Seiko’s own words: 7S26 and 7S26A is the first generation of this caliber and are the same. The letter indicates the evolution of the caliber 7S26. Therefore, modern Seiko watches, such as the Seiko 5 Sports family and Next Gen Orange Monster, have since been upgraded to the 4R36, making Seiko collectors happy because the 7S26 seen here does not hack and is not hand-windable – two functions that have become more and more popular and are the main differences between the 7S26 VS 4R36 movements. The caliber 7S26 is no longer in production and has been replaced by Seiko caliber 4R36 (or non-Seiko branded NH36A). Setting Time Backwards/Counterclockwise.The difference between B/C in Seiko’s own words.The difference between A/B in Seiko’s own words. ![]() Some of the topics covered in this caliber listing:
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