Been going through my stash of valves for my new amps when I get them built. I normally keep notes with all the good ones, but came across this pair of either ECC82 or ECC83 I think they are. Not sure who I bought them from, does anyone recognise these?

They were kept with the good stuff, so they are something decent. It's a long shot I know, but it's got to be worth a try lol. Can anyone help?