Two vintage U.S. Naval Academy Midshipman Collar Anchor Insignia. 1 3/8" long. These are two older insignias. They can be dated by the clutch used on the back to hold them in place. Each of these clutches are early Phinney Clutches. They are marked: Pat. No. 1454857. These are somewhere between 1923 and 1942. After 1942, the very common Ballou-type clutch was used. They are not marked, but they may be gold-filled or plated. Solid brass would tarnish more. They have probably been polished a lot; thus, some of the gold shine has been lost on the front.