This die-cast enamel coated keychain was made exclusively for Independence Seaport Museum is silver plated and has the name of of Submarine Becuna engraved on the back. The perfect accessory for lovers of all things Becuna Packaging includes historic information about Submarine Becuna. Submarine Becuna (SS-319) is a Balo-class submarine that launched in January 1944 after just nine months of construction and was sent directly to the Pacific theater of World War II. During her 25 years in service, the submarine traveled globally and even underwent a modernization process known as the “GUPPY” Program. Becuna is the only Guppy 1-A type submarine remaining anywhere in the world. Dimensions: Keychain: 1"L x 3.75"W Packaging 3"L x 4"W