Cleveland Tool Allen Wrench set design patent was issued Feb. 24, 1953 & the stamping pre-dates ZIP codes which started in 1957. (Cleveland 3, Ohio == 44103 in ZIP )
OK if I use the image for a DATAMP entry for the patent?
Stan Schulz, editor MVWC Newsletter & DATAMP "wrench steward." ( mwvwnews at gmail dot com )