Rare Vintage Stanley 7\" Four Square Combination Square Pat 1-23-17 Sweetheart For Sale

Unlike standard 6-inch Stanley No. 21 squares where the digits stop earlier, this is the authentic, unnumbered 7-inch rule variant manufactured specifically for the 1920s Four-Square line. The rule extends a full inch past the number 6 to the absolute edge. Nice clean Sweetheart stamp and pat date. Thank you for looking ships free.