I am sorry, I was confusing. Yes, the HSF badges have a concave appearance, I believe that the Schwerin examples have some of the more pronounced concave pattern. I was curious in the molding and why the HSF badge for all makers seemed to be concave vs what Gordon stated, the Coastal Art. badges have a flat reverse side, as do most of the other KM badges, with the only exception being the S-boat first model for some makers. As Gordon W. put it: "Only the obverse deisgns were specified in the original foundation orders, so whether a badge ended up with a concave reverse like the Fleet Badge or a flat back like the Marine Artillery was most likely decided for technical reasons by the guys responsible to creating the tooling." I guess what also got me thinking, was that it would be very costly for a company, (Schwerin, FB, RK, RSS, etc.. To invest in this tooling and machine dye set because of a front and back plate to adjust their company's maker mark emboised in the badge. Just an observation, I am not sure how many people (rough estimate qualified for the HSF badge) I wouldn't have thought it profitable for so many companies to produce such a badge. I was just curious on why and for what purpose that the badge was needed to be in a concave format vs a flat format... It probably was because of machinery design and Sorry for my poor wording and for confusing everyone. Thank you Martin W. and Gordon W. for your responses. I greatly appreciate it. Thanks, 2dresq