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Showing results for tags 'orientation'.
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I've just replaced a balance staff on a Bulova 10AK movement from WWII with a NOS Bulova 7AK staff (according to jules borel, these should be interchangeable.) I also had to replace the roller jewel (I sourced a roller jewel from an AS 1194, again, interchangeable). Now the watch is running wildly differently depending on which side is up. I've attached some photos, keep in mind my timegrapher is just a phone app which uses my phone microphone , so some of the random blips may be outside sounds. Back side up the movement can be regulated pretty close to accurate, but when the dial side is up it runs CRAZY fast. Could anyone explain what went wrong/what may be the issues and potential solutions? Thank you for any help you can give!
