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Westinghouse photo-electric cell

Kunz photo electric cell (1925)

1925

Photo-electric cell, VNG7

Photo-electric cell, KG1

Photo electric cell made at the Clarendon Laboratory

Dummy photo-electric cell type C.M.G.8

Photo-electric cell

Photo-electric cell, KMV6

Photo-electric cell, KG2

Photo-electric cell, new type, CMG 8

Weston normal cell (photo-electric)

1926

Westinghouse red-sensitive photo-electric cell

Working model of Baird multiplier photo-electric cell

Baird multiplier photo-electric cell (sectioned)