14Q7, 14A7, 14B6, 50A5, 35Y4? All easily available at any of the places that have a broad stock of tubes. e.g. ESRC, Antique Electronic Supply, etc. One of my specialties is the loctal Zentih Transoceanic (8G005) which some describe as rare but really they're as common as dirt. I was surprised that many of the stocks of loctal tubes are recentish (60's, 70's) Eastern European production - I had always thought of loctals as a Philco thing of the 40's. The business sense in dealing with something that hasn't been made in decades (or indeed more than half a century) is contrary to most business rules of thunb. To have a profitable resale business as a rule of thumb you have to be able to turn your inventory over several times a year. Anything not sold after a few months has to be slashed in price or simply thrown out to make room for the new stuff. The tube resellers have to work differently - their stock is already decades old. It's not a business I'm in but I can appreciate some of the challenges. I think the business world of tubes has seen some tumultousness recently, what with the US Govt unloading huge stockpiles of many tubes and the de- nationalization of Eastern European/Russian factories, but may be stabilizing a bit. Tim.