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This is an antique Black, Starr , Frost sterling silver travel alarm clock presented to a naval officer by his staff in 1919. All of their initials/monograms are shown on the top as they were engraved by the Black, Starr , Frost jeweler. The case has a carved Greek Key design on the border and the inside has a hammered design. Hallmarked and marked Black, Starr , Frost. Clock is 15 jeweled, J.C. Tava, Swiss. The officer to which this was presented had the initial CMD as you see in the center cartouche on the front along with the 1919 year date of presentation. Size of case is 3 1/2" by 2 3/4" by 5/8' deep. The inside holds its original Black, Starr 8 day alarm clock which is no longer working. Jeweler says it needs a spring but the rest of the mechanism looks fine. The case is excellent condition. You can hear the loud snap as it closes securely in place and it stays closed. From an estate and not polished. It has one small scratch on the front. Weight is 219.1 grams which includes the clock. As you know, Black Starr , Frost were exclusive, expensive silversmiths in the early 1900s. They used very thick, high quality silver in their products and were competitors of Tiffany , Co. This is a most unusual estate find for any World War 1, clock or antique sterling silver collection. Completely original.