Similar to the Wife sweetheart locket is this nice example of a mother of pearl 14k gold plated locket. Many differenent versions of this broach/pin were made. Some had branches of service embossed on the hearts and others had unit insignia such as the 4th Army on the "Wife" example. These were purchased in many of the Base Exchanges and many of these would be found in the local 5 and dime stores, Woolworths, and other stores located just outside military installations.
Smitty