Shaffer Tool Works Employee Watch Fob Charm Tag Oil Field Co HTF. It is almost 1 5/8 x 7/8  Inch. It looks like it is made out of brass.  Managed ebay accepted Buyer pays shipping and handling of $5.00 in the US more for international shipping. In 1922, William D. Shaffer founded the Shaffer Tool Works in Brea, California to supply the oilfield industry during the second Santa Fe Springs, California oil boom.^[1] The company was incorporated in 1938.^[2] Shaffer bought the oil field equipment business of Alco Products in 1962.