Old Hotel St Francis Key and Fob San Francisco, Brass

This in an old room key with fob from the Saint Francis Hotel in Union Square San Francisco. It likely dates to at least back to the 1930s. The fob is made of a thick piece of brass that was silver plated. The key is marked "Yale & Town Mfg. Co Yale." and the fob is marked "return Postage Guaranteed". The fob is worn, has a slight rust stain from the key, but is in generally good condition.