That tube caddy is a nice find. It would have been used by a technician that serviced tube TVs and radios at homes and businesses. There are some triode vacuum tubes that the audiophiles covet and will pay dearly for. You might want to cross reference the tube numbers you have with some of the audiophile websites. I'm saving a couple of shoe boxes of 12AU7 and 12AT7 tubes in my retirement fund.