1983 Hyper - BMXmuseum.com

from eby ad:

What have here is Greg Grubbs' personal factory team Hyper frame and fork from 1983.  Hyper was the brainchild of the late Billy Farrell from New York and was only in business for a short time.  This is one of the first frames from the first production run.  Greg only rode it a short time as it was too small and flexed too much for him with the twin tope tube and eliptical down-tube configuration.  They built a longer, stiffer Hyper for Greg that he is keeping.  The serial number  is 683294 but neither Greg or I  have any information as far as decoding it. a piece of BMX history and a personal frame from 2007 ABA Hall of Fame inductee Greg Grubbs' personal collection.