CV2493 Tubes, can't find any info

Thanks yogi

I thought you'd show up with an answer. Do you know if these are a later designation? Not in my book for some reason. My book is probably from the 50's. maybe 60's. The tubes don't look new but I don't know either. The codes might indicate a date but I can't find any info. I didn't see any of them anywhere, which seemed odd to me. Going to give them a listen very soon. Time to test the new toy. I'm sure all the Mullards should be good. Hope so, I don't think I have any other variants of these but I might. Never had a piece that used them before.

noromance

Thanks a lot. Great info.

You guys are amazing. Thanks

Interesting video, what a process. Incredible amount of work into each valve or tube. Hard to imagine it being profitable but I know it was. Lots of automation but still a tremendous amount of tedious work too. I especially like the point that "even left handed people could to it: :) I was surprised at how often bare skin came in contact with the various components. Lots of heat, some acid baths, maybe that takes care of it. Interesting anyway. Now, I know how to make my own. :)

Thanks guys. Nice to hear an upvote and great info.