My parents bought me a used Stingray back in 1966, it was well used and several years old at that time. It was redish colored with Schwinn stencils, had a Schwinn name plate on the head tube, and a white banana seat. However it was a little different than other Stingray's I encountered in that the upper rear swing arms left the drop outs and terminated at the seat tube riser rather than continuing on to the the head tube as every other Stingray I have ever seen do. The bike went through many changes over the years and the guy at the local bike shop was always after me to sell it to him, but I still have it and would appreciate any help to identify it's age which I have been unable to do with any of the on line sites I have found. The bottom bracket is stamped with 1/4" letters/numbers, centered in the bracket is the number X87102, also along the edge near the bearing cup there is a figure I can only describe as a cross between a sombrero and Pacman folllowed by 1/4" numbers 237.
I was hoping for any info you folks might be able to share, thank you.