Internal 3 Piece Set For EIC Musket

Comprising of tumbler, sear and bridle.
The tumbler is the type accommodating of a 'bun nut' as opposed to a screw. Although this threaded peg may be removed if desired to accommodate a screw.
Boss of tumbler is 9.2mm diameter, thread of tumbler is 3/16" (cast-in thread)
Bridle holes centre to centre are - 9mm, 18mm and 23mm.