There it is -- still pretty much functional after a half century.
One minor customization -- the gear that couples the lens and the rangefinder
is replaced with a special version. It has a spring-loaded center hub that allows
lifting the gear and removing the screw-mount lens without actually removing the gear.
We never did acquire the accessory wide angle and telephoto lenses, but used to
remove the lens to use it on a homemade enlarger "back in the old days." :-)