Vintage Unusual Keychain

Vintage J. A. Sexauer Mfg. Co., 2503 Third Ave., New York Spark Plug Gap piece that you put on your key chain. Advertising reads: Blue Spot, Balloon Tank Bulbs, Make The Tight Line Stay. Other side reads: J. A. Sexauer Mfg Co., 2503 Third Ave., New York. Heavy metal piece. Size is about 1 5/8" by nearly 1 5/6". Good condition, mild use. These hung onto your key chain to have handy for measuring spark plug gaps.