Where I found those photos of the Cobras in the paddock at Elkhart, it said that one of those Cobras belonged to the late Karl
Shiftmeyer, most likely the one in the back, maybe that will help with the i.d.
Mike
PS: OK did some searching, the spelling of the owner by the OP is I believe wrong, I think it's Karl Schiffmayer, who at one time
owned 2263 and 2513 (quite the story behind that one in the 4th edition of the registry)
Mike
this is in reference to my post above #3074