Here is a Socony-Vacuum/Mobil mirror likely from the 1940s/50's. I used to see these show up on Ebay every so often, but I can't say I've seen one for sale in many years now. I know where there is a great Hi-Speed restroom mirror, but I am unable to get a pic of it.
So everyone is aware these vintage original mirrors are reverse painted with the mirror silvering over the design, these are not decals on the front of the glass. I've seen fakes with a decal or sticker on the front, which is not original.