A word of caution: that "N" marking is more than a century old. A problem with the RB mechanism is, that if anything is worn in the interlocking of the two block elements on their pins, this results...
Type: Posts; User: Patrick Chadwick; Excluded Forums: Milsurp Knowledge Libraries (READ ONLY)
A word of caution: that "N" marking is more than a century old. A problem with the RB mechanism is, that if anything is worn in the interlocking of the two block elements on their pins, this results...