Vintage PENNZOIL Safe Lubrication Porcelain Metal Test Print Sign this is considered to be a proto tester they stamped these by firing them and stamping logo into

Ipennzoil safe lubrication Supreme quality and it's got another logo beside it that was probably a milk related stamping that didn't quality more than likely both of these were turned down and they were to be thrown away and someone thought something of it to keep it because it's still a pretty good image of Pennzoil I'm not exactly sure who made this sign but doesn't have the name this measures approximately 10" × 3" and it's very nice thicker Porcelain Enamel over Metal it could possibly be a small door push or just a small test print Porcelain Metal Sign

Regardless of what it actually is it's definitely a sign that has advertising of Pennzoil and it's a older one someone thought enough of it to put four mounting holes in it and hang it up probably and their house and it's passed on over time looks to be from the 1950s 1960s it has some Rust and a little bit of damage on the middles section but this is pretty unique you will not find another one like it from my knowledge