RD761.)WWI US ARMY AIR SERVICE OBSERVER'S WING: genuine silver composition, so-called 'half wing' being for US Army Air Service observers (navigator). 40mm wide, well detailed 'O' with wing. Has horizontal swing pin and 'C' hook catch on back. Marked 'STERLING' on the reverse. This gem just came out of an old US insignia here in Florida and was recently condemned by some exert as being an old, vintage fake. Wow...okay. The only reason why you'd know that this old copy is a fake is because we are telling you that it is! Kerrigan shows this example in his reference work American Badges and Insignia, page 64. He identifies this badge as being. According to him this 1/2 wing was authorized for use on December 29, 1917'. If genuine this would be a $300 wing! EXC++++