Great post Mitka – i had to work on an FHF 72 a couple of weeks ago and was struck reading today’s entry how structurally similar the movements are: http://17jewels.info/movements-en/movements-f-en/movements-f-fhf-en/770-fhf-72.html
Nice Balance bridge! Too bad you cannot set the beat error the easy way, though!
Yes it’s a bit of a hit and miss operation;)
Dear Mitka, I hope you’re well.
For your information, the calibre number of the non-date Cronos movement is 54-00-2 (or 5400 or 54A in Seiko’s newer movement numbering system), and the calibre number for the early (pre-760/850/760x) Seiko Champion movement that you also serviced is 54-20-1 (or I would guess 5420 or 5420A in Seiko’s newer movement numbering system), as seen here: https://www.tapatalk.com/groups/seikoholicssupportforum/an-old-post-about-caliber-numbers-t381.html
People often call the early (pre-760/850/760x) Seiko Champion movements (and the first-generation, non-hacking King Seiko movement 54-40-1) “un-numbered”, since these numbers are not widely known.
Thank you for the info! Interesting stuff
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