50s vin age Tissot bumper automatic #watches#watchesofmastodon . What's a bumper movement?
The bumper movement is a type of automatic movement that uses a rotating weight, or rotor, to wind the mainspring. The rotor is attached to a pivot, which allows it to swing back and forth within a limited arc
@violinguy 50's must be pretty late for a watch still using bumper-style, right? I would think that by the 60's almost all automatic are circular-style as we know today.
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