Private Lugnutz
Well-known member
Openings of 11/16 x 13/16 is an odd combination, I agree, hence the need for a letter caveat to squeeze it into the old Williams' inspired industry standard numbering system, but the 27C (9/16 x 11/16) was actually a very popular and common wrench set wrench in the 30's and 40's. It was crucial in getting from 3/8" to 1", including all the major sizes in between without duplicating an end, in only six wrenches, which is the reason the Army used it in their GMTK's for decades.I found it strange they would put 2 16th sizes on one wrench but ok.
Speaking of GMTK's, I found a 2015A (13/16" x 7/8") today. It's the middle wrench in a 3-piece 15* angle pattern set specified by the Ordnance Dept, along with an even harder-to-find 2014A (11/16" x 3/4") and 2016 (15/16" x 1"). It's prewar, but will make a good placeholder for someone having a hard time finding the real deal. Shown with a wartime example below for comparison. Wartime on top. Note the Circle-DC logo and no vanadium marking.



















