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u/NecolumbusKing

Image 1 — Information on Ludlum model 4 survey meter?
Image 2 — Information on Ludlum model 4 survey meter?
▲ 26 r/Radiation

Information on Ludlum model 4 survey meter?

Found this online and couldn’t find very much info on it.

u/NecolumbusKing — 4 days ago