Industar-22 (1955) disassembled
I did it! I disassembled, cleaned and reassembled my Industar-22 (1955) which I previously used with my Leica Standard E (1932) but there were febris on the glass inside, and the apteture ring worked with big resistance. It works!
Aha, I haven't disassembled the glass blocks (lenses) and no lens touches the ceramic plate!