A scarce Coast Artillery DI, made by Robbins.
906th Coast Artillery Regiment DUI. This coast artillery unit, formed in 1928 was originally the 551st Coast Artillery (AA) Regiment constituted just 3 months prior. Organized at Burlington, Vermont in 1929; inactive in 1933, and disbanded April, 1943.
Made by “Robbins Co. Attleboro, Mass.” and is screw back.
A scarce DI, made 20’s -early 30’s.