Cybernetic tortoise, developed to help with studies on brain function
1950-1952
PHOTOCELL, made by Pressler, Leipzig
1876
Selenium photocell
Photocell, Radiovision Selenium Light Bridge
Photocell, Baird Type VA 26
Photocell
1940
Large Photocell, no identifying markings
Photocell, type PE 8 ZC12707, no makers name
'Keyhole' photocell
1948-78
Early 8-pin photocell
1946-48
Photocell, Osram Type CMG 8
Photocell, Type KMV 6, no makers name
Photocell, Osram Type CM 8, serial no.18783
Finish Photocell
Start Photocell
Type TR photocell
1940
Small photocell, no identifying markings
Photocell, RCA Radiotron 929 OE/566
Osram Photocell
Osram Photocell
Photocell
Cintel Photocell
Rubidium photocell filled with gas (neon and helium)
GECO Photocell
Rubidium photocell filled with gas (neon and helium)
1901-1970
Early type TR photocell
1946-48