This is a 1915 match safe originally advertised as "The Trench Water-Tight Match Box." The edge has Birmingham 1915 sterling hallmarks. The maker's mark is rubbed but are probably those of Edward F. Braham Ltd, Birmingham, England. There are secondary hallmarks on the inside of the lid. Its approximately 2 5/8 x 1 1/4 inches with a steel saw-toothed striker to the bottom. Very good condition, it has numerous small ding on the sides and bottom.
Trench Water-Tight match safe, sterling, Edward F. Braham Ltd., Birmingham 1915