Very rare find here. This is a new old stock type 43 green box Sylvania Tube . To find one unused like this is very, very rare to say the least.

Feel free to ask any questions that you have

Thank you for looking

Happy hunting

Have a blessed day

I’m listing a lot more tubes currently because I’m gonna have to pay for my stepfather’s funeral here soon as he’s on hospice and declining rapidly so be sure to check my other listings if you’re interested in more audio and vintage tubes

B2