If you're somewhat of a 'Tube-Head' like myself, you should have a look at this site. Lots of links to other sites too, mostly European...some non-English, but any data usually is easily translated, photos of course universal...a few early semiconductor/transistor sites too...
If I've posted this before, my apologies..
http://lampes-et-tubes.info/index-e.htm
CAUTION: You could be distracted for a long time!
Steve A.