U-197A: USA

3 1/2" - 2 5/8" X 4 3/8" (88mm - 66mm X 111mm)

 

(base embossed) MACOMB [dry process]

{Macomb}

 

Picture courtesy Elton Gish

Note this is a two part glaze-weld -- this version is only threaded on the bottom part to avoid alignment issues.

U number assignment by Jack Tod.


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