Popper & Adelhofer

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Popper & Adelhofer

Anton Popper (US) and Leopold Adelhofer (Hungarian)

Popper & Adelhofer

Popper & Adelhofer

Serial #2710

Courtesy of Daveofsuffolk

Popper & Adelhofer patented a similar base to this one, but without the drive shaft, in 1924 in the US.