Cybernetic tortoise, developed to help with studies on brain function
1950-1952
Photocell, RCA Radiotron 929 OE/566
Large Photocell, no identifying markings
Photocell, Type KMV 6, no makers name
Photocell, Radiovision Selenium Light Bridge
Photocell, Osram Type CM 8, serial no.18783
Early 8-pin photocell
1946-48
Type TR photocell
1940
'Keyhole' photocell
1948-78
Selenium photocell
Photocell, type PE 8 ZC12707, no makers name
Small photocell, no identifying markings
Photocell, Baird Type VA 26
Photocell, Osram Type CMG 8
PHOTOCELL, made by Pressler, Leipzig
1876
Photocell
1940
Cintel Photocell
Osram Photocell
Osram Photocell
Rubidium photocell filled with gas (neon and helium)
Photocell
GECO Photocell
Early type TR photocell
1946-48