This is a 1917 hardware store 1 1/2 listing

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At that time both the No. 1 1/2 and No. 2 were simply listed as Damascus. Your barrel has remarkable contrast if not refinished, and is 3 Iron "Oxford"
The No. 3 was offered then with either Chain or Krupp and the No. 4 with what Ithaca called "American Flag" or Krupp.