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https://miyotamovement.com/product/8215/
The official page for the 8215 says a “running time” (i.e. power reserve) of 42 hours. The spec sheet says “more than 42 hours.”
The 8205 and 8217 have the same running time/power reserve as the 8215.
http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Miyota_8200
Per this it has 45 hour power reserve.
Ok thanks!!
Keep in mind that the 8000series movements from miyota have a few quirks that seem to bother people.
The seconds hand can visibly stutter and also stop for a little while if shaken, the rotor is unidirecțional and spins freely in one direction sometimes being loud and might even wobble.
Thanks for pointing thag out. Is it just due to the fact it’s a less expensive movement?