The masco sign says "BATTERIES MFG. CO. DETROIT, MICHIGAN" on the battery itself. It also says STOUT SIGN CO. ST. LOUIS, MO in the lower right corner of the sign. I actually pointed it out to my father at a swap meet, but passed it up because I thought it was too much money($75). Later that day I left the swap, then my dad called me and told me he thought I should have bought it(he was still there for a car show). At the end of the car show he went back and ended up getting the sign for $50. Looking back I'm glad he got it because now it's one of my favorite signs.
Thanks for the toy complements too, Ive got some pressed steel ones too.