A-D serial numbers? I'm trying to identify my recently purchased steel frame set. Based on recent forum help it looks closest to an Austro-Daimler (though a bicycle fiend friend with three decades of experience suggested that it may be a Pinarello). The frame has been re-painted and hence no badge or decals. Gipiemme dropouts. Serial number on the bottom bracket, toward the front is 7114455 F. On the opposite side, toward the rear of the frame, is 6 457. Does that sound right? The few databases I've seen only have the initial numbers with no mention of the numbers on the rear of the BB. Any ideas?