ARS is a company that has been in business since 1947. They sell a lot of tubes. They at one time sold tubes with ARS on the bottle. I would say that it has to be a fairly old tube. Here is their link: ARS Electronics Since 1947 - Home Page - Electron Tubes - Amp Tubes - RF Heating Tubes - Broadcast Transmitter Tubes

Hey Marty..
I was going through some of my old forgotten preamp tubes and I found one 12AX7 with the brand 'ARS' written on it with the town of Van Nuys, Ca, also written on the tube.. It seems to sound pretty good..is that just another repacked Chinese tube? I remember getting that tube way back in the late 1980s...

Please advise when you can..

Thanks..