You are bidding on a pin from the Grand International Auxilary to the Brotherhood of Locomotive Engineers. The GIA was formed in 1887 by the wives of engineer members of the B. L. E. The G.I. A. functioned as a social group for wives of operating engineers. The ladies also performed charitable service such as feeding operators when they were on strike and providing financial and other assistance to widows and children of deceased railroad engineers.The pin is marked, "Pat. Apd. For 14K on the back. T is a pin back with a latch. The front has the letters GIA in a half-moon design attached to which is a small star with the word, "to" engraved in it. Two small chains attach the half-moon to the letters "B L of E." I don't know the exact age of this pin but I believe it has some age on it. It is very dainty and pretty. It would look lovely on your lapel, scarf, or purse, or displayed in your collection of railroad memorabilia.