i was wondering about is the use of this style of locking nut - three allen screws, each raise a *plate* that compresses two strings against the top underside of the assembly. i wonder how prevalent this style is, if it saw multiple issue years.
also, the tremolo bridge is interesting, rolling string guides and such - the b string tuning knob (for use when nut is locked) is partially stripped or otherwise defective, and i might consider replacing it if could find an original of the same kind.
now i'm just rambling ...