I love how different these all are. In a sense, the artistic interpretations combined with the exigencies of wartime manufacture, in the European made insignia make them very interesting! I note:
- Lt Cohen's collar wings do not have the rivet holding the propellor. Are they one piece or two pieces?
- The thick bronze version of Lt Bilderback's insignia has a somewhat different propellor from the thin versions (Yours, Chuck's and Mine)--even though the wings themselves look very nearly (or as near as I can tell) identical. Can you tell if the bronze ones are cast or die struck? The hardware of the bronze ones is quite different from the rest. It makes me wonder if Lt Builderback might have had them custom made? Has anyone ever seen another thick bronze one? The thin ones are almost common compared to these thick bronze ones (well as common as WW1 era, European-made air service insignia can be).
The props on Cohen's insignia move, they have a post that connects them to the wing which allows them to flop back and forth. The thick bronze appears to be die struck.