Cybernetic tortoise, developed to help with studies on brain function

1950-1952

Early 8-pin photocell

1946-48

Type TR photocell

1940

Large Photocell, no identifying markings

Photocell, RCA Radiotron 929 OE/566

Photocell, Radiovision Selenium Light Bridge

Photocell, Osram Type CM 8, serial no.18783

Photocell, Type KMV 6, no makers name

PHOTOCELL, made by Pressler, Leipzig

1876

'Keyhole' photocell

1948-78

Photocell

1940

Photocell, Osram Type CMG 8

Photocell, Baird Type VA 26

Photocell, type PE 8 ZC12707, no makers name

Small photocell, no identifying markings

Selenium photocell

Cintel Photocell

Osram Photocell

Osram Photocell

Rubidium photocell filled with gas (neon and helium)

Photocell

GECO Photocell

Early type TR photocell

1946-48