Zenit shutter counter removal tool
thingiverse
Custom tool for Zenit TTL disassembly (some other models too). Screws used: 2x M2x10 for plastic https://www.aliexpress.com/item/4000982209705.html?spm=a2g0s.9042311.0.0.27424c4d4h4HIC I cut the Safety Pin with pliers, preheat it with lighter and inserted it into the holes.
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