Wow, did you find one NOS? It's in fantastic condition! Congratulations!
It would be interesting to see some disassembled photos, for comparison with a normal 1911.
It's almost the same as standard 1911 except for barrel (linkless) , trigger
..hinged you can see the pin just above it. Very smooth and light. Mags and grip if course. Everything else will use standard 1911 parts.