Several measurements of the frame are frame-number specific.
Pin separation.
Width of an individual barrel tube at the breech.
Height of firing pin centers (bore center) from water table.
Width of extractor.
Width of beads where they contact the water table.
Height of bottom of rib extension from water table.
Page 47 of the Parker Gun Identification & Serilization book covers all of this and lists the measurements for each.
What about height from water table to bottom of frame? Or top of standing breech to bottom of frame?
