3 1/4" X 4 1/4" (82mm X 108mm)
No markings [dry process] {Davidson & Stevenson}
Picture courtesy Elton Gish |
U-151A: USA
3 1/4" X 4 1/4" (82mm X 108mm)
No markings [dry process] {Davidson & Stevenson}
Picture courtesy Elton Gish |
U number assignment by Elton Gish.
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