Pan Am Airlines Vintage Pet Cargo metal sign

Vintage 1970s Pan Am Airlines Clipper Cargo Pampers Pets Dog Crate Metal Sign. In good vintage condition. original and authentic metal sign used by Pan Am Airlines to promote its pet handling services. The sign shows evidence of use and measures 16.5 x 10.5 inches. These signs were attached to metal cage-like crates. I purchased this from an estate sale of a retired Pan Am pilot. I have several Pan Am pieces in my Poshmark closet from that estate sale, so take a peek to bundle and save. I’ve very lightly cleaned the sign with a damp towel and mild soap, but I didn’t want to do too much and I don’t know the proper way to clean these. The last thing I wanted to do was mess up trying to clean this vintage beauty!