My Speedmaster Professional has a caliber 863 movement in it. I just pulled it out of my vault to test how many turns of the crown it takes to wind it fully. It hadn’t been worn for months, so it was totally run down. It took 50 turns of the crown to wind it fully! It would seem to me as though your watch is little more than half wound at 30 turns. Might this be a contributing factor in its stopping! You might want to check with the shop that fixed it.
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