Hi Jim, your chisel was patented on May 6, 1924 pat. 1493176 as you stated.
by George A. Wood of Southington, Connecticut and assigned to the Stanley Works, New Britain, CT
George stated that the body design could be used for chisels or for screwdrivers.
as for the hole in your wrench, I have some tools with holes drilled in the strangest spots, yes, "what were they thinking"
Frank