Here is what (six of them) looked before assembly. Three parts each - body and shank, knuckle and lift pin.
Actually, there was a fourth part also. A small spike acting as the knuckle hinge, referred to as the "escutcheon", a word I never heard of before,
And here are the first two I assembled. The hinge spike will later be trimmed to length.
Since I do not yet have any coupler boxes I am unable to install them and cannot make any live tests. But they seem to couple and uncouple as they should when doing a simple test by hand.