Williams model F-P T/C Sight
Does anyone have any info on this sight.
Our research through an Old Sight Manual list this to fit a "TC" --Thompson Contender.
Also read where the open sight aperture could be special ordered instead of peep.
Looks never used. Not sure what BL or TK stands for on box.
Has anyone ever seen one of these, we are wanting to put on auction, value?