U-197: USA

3 1/2" - 2 5/8" X 4 1/2" (88mm - 66mm X 114mm)

 

(skirt embossed) MACOMB [dry process]

{Macomb}

 

Picture courtesy Mid Norris

Note this is a glazeweld with both parts threaded, sometimes not lining up correctly.

U number assignment by Jack Tod.

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