This 14k yellow gold pin is made by Bailey, Banks & Biddle. The pin is of Corps Castle.

The U.S. Army Corps of Engineers gold castle pin, is worn by engineer officers.

"At the turn of the century, Bailey Banks & Biddle was commissioned by the U.S. government to update the Great Seal of the United States; its design today remains the official version of the seal. The company also designed and made many of the military medals that are still used today, including the Congressional Medal of Honor, the Silver Star, the Bronze Star and the first 40,000 Purple Hearts awarded, as well as class rings for West Point and Annapolis."