A few months ago I posted some pictures of a cobra decal to see what it was from. Nobody seemed to know. The decal was stuck on a few things from the dealer clean out I went to. I had also asked about the Red Barron stencil that was on my Promark trike seat, (Baja cub) and I did see the decal on the back of one other Alsport MTS 30 headrest. Thanks to some research from John, (dumptruckboy) the mystery has been solved. In 1978 Promark had all these stencils/decals to "customize your own trike". Learn something new every day.