duddly
Perhaps "exactly" was an overstatement. As you can see, mine is clearly tri-square (or triangular), like yours, but it has a slightly swooping almost needle-like shape, and unlike yours, has a round shank for inserting into that set-screw secured holder opening. As I said, steel no-roll handle. Mine is marked. JAS SMITH & SONS. With a "9" - indicating either a date of production of perhaps a model number. There was a James Smith & Sons on High Street, Atswood Bank, in Redditch, part of Worcester, England at the turn of the century and doing business well into the 30's. They made package and sailmakers' needles. Perhaps these "awls" are related to that trade. Fids, marlinspikes and the like were pointed but conical. I did fid some references in period documents to square awls, but they were actually square.