- Back
-
Title: German OPTA K7/3 cathode ray tube with shield, pre 1939 [Go to resource]
Description: German OPTA K7/3 cathode ray tube with shield, pre 1939 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1992-518 Go to resource More Like this...
[Edit] - Back