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Neeb
·A slightly weird issue here. Two 1960s watches I have, a Seamaster De Ville with a 552 movement and a Constellation with a 751 movement, were serviced recently by a local watchmaker. I hadn't worn them for any extended periods before servicing. With the micro-adjuster screw I've managed to regulate them to within two or three seconds a day, as long as I'm just wearing them about the house or they are off the wrist (they don't seem particularly sensitive to positional differences).
However, If I go for a 30 minute walk both watches will have gained about 15 seconds when I get back... They will immediately then settle back into near perfect time-keeping (except for being 15s ahead of course).
I've seen other threads in various places reporting similar issues, and theories put forward include overbanking (unlikely in both watches presumably?), and interactions between the rythmic nature of walking and the periodicity of the balance spring ocsillation...
My King Seikos don't do this, but they are 8 bps movements rather than 5.5.
Is this just something I have to live with due to the particular nature of these movements, or is something wrong/fixable? It could be quite a major issue if I was wearing one of the watches on a long walk (e.g. hiking), assuming it was linear with time (could the watch gain several minutes?).
However, If I go for a 30 minute walk both watches will have gained about 15 seconds when I get back... They will immediately then settle back into near perfect time-keeping (except for being 15s ahead of course).
I've seen other threads in various places reporting similar issues, and theories put forward include overbanking (unlikely in both watches presumably?), and interactions between the rythmic nature of walking and the periodicity of the balance spring ocsillation...
My King Seikos don't do this, but they are 8 bps movements rather than 5.5.
Is this just something I have to live with due to the particular nature of these movements, or is something wrong/fixable? It could be quite a major issue if I was wearing one of the watches on a long walk (e.g. hiking), assuming it was linear with time (could the watch gain several minutes?).
