I got this 2-piece officer's subdued cap badge in a small grouping of navy items. I never saw one before and was hoping to learn more about it. It is marked "Sterling Balfour 1-B" on the back". I found out on the forum that makes it around 1960-65 production, but that's all i've been able to find. Since the Navy was not making the gray cap anymore, I'm wondering what kind of cap this badge was worn on? Who wore it and when? When did they start making this? My guess is for Navy ground forces or river patrol in southeast Asia - but I don't know? Any help would be appreciated.