WS 22: Servicing a SEIKO 7005 including replacing the balance

Found the watch on August 12th 2002 on a stroll to the weekend market Jatujak. Please find the report about that watch hunting here. The watch was running and stopping in an unpredictable way. A look at the hairspring of the balance wheel gave reason to believe that it needed replacing. So I had bought a spare balance wheel quite a while ago, just never found the time and "courage" to start this servicing and repair on my own.

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