This Sharp is probably the most famous dual-cassette systems, having graced countless music videos, album covers and advertisements. The GF-777 (aka GF-777Z) graced the back of Run DMC’s debut album and has eluded us for quite some time now, placing it in the Holy Grails list. Bill provided this pic and a plea to find one–he’s an avid boombox collector and sells them occasionally, too. Check our classifieds area for more info. UPDATE (courtesy of Ed): “the GF-777Z had an earlier model, the GF-767 with less features and blue speaker covers (this was the actual radio that was captured on the back of Run DMC’s first album). Now most importantly its other REAL holy grail relative was the GF-909 which was the same GF-777 but it was a production prototype only sold in Japan. The difference was that system’s text was in Japanese and the speakers were all black.” Thanks Ed!