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[3640702] Jodi [甲信越] 2026/08/19(Wed) 19:38 
Here are a couple of pics, the movement serial number is 4,118,152 and I am also showing the stamp on the inside of the case back. That decision left several million used stopwatches in school hands that were obsolete. Time torpedo runs, estimate distance of enemy artillery (time between flash and sound of firing) plus many other military uses. I reset these Chrono hands all the time. Inside there are heart shaped cams that reset the hands to zero, it is possible that they or payidpokies1 the levers are gummed up, or there are other mechanical problems.
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