Old Dumont scopes

IIRC, the earliest production model DuMont had the 2" CRT in a can on a little stand, with a short cable that attached it to the electronics box. This was definitely in the mid-to-late 30s. The oldest scope I own currently is a Knight 7" from the mid 50s - even works... James Millen also made a line of rack-mount scopes in the 40s for integration into radio gear. Very cool units, about 5 RU, black crackle finish and big rectangular knobs. ObClassiccmp: O'scopes were used in the Whirlwind as memory register and output displays... in the old pictures one can see several. And the EDSAC had scopes for the same use - the early Tic Tac Toe game was 'displayed' on one of the memory scopes. NOT to be confused with the Williams tube of a decade later... Cheers and Best of the Season! John