Surfriders. A Bridgestone , without the BS? From watching this web sight over the years and what I recall from growing up in the 1960s and 70s. Surfriders were rebadged , styled slightly different versions of the BS7 Sporster 50, the BS 60 sport and the BS 90 standard. I think they were listed for sale in the S & H green stamp catalog. Some regional retail stores or other catalog stores may have sold them. I don't know if they were sold thru the BS. Dealer network. I never saw one there. Like most details of BS Rockford distribution, only Lew Emory knows for sure