The following is the first Super Famicom prototype system, revealed to the Japanese in late 1988, a full two years before a revised version was released in Japan in November 1990 and about three years before the U.S. SNES release in August-September 1991.
In the same style as the 16-bit Super Famicom prototype, a redesigned 8-bit Famicom prototype, also from late 1988:
...I like this much better than the released, redesigned AV Famicom and NES released a few years later.
As for that Super Famicom prototype, I really like it, a lot. Perhaps it's not as good as the final, released Japanese Super Famicom but without question it *is* FAR better-looking than the American SNES, IMO.
Complete EGM issue #2 article on Super Famicom from summer 1989:
http://i41.tinypic.com/rvyjcg.jpg
http://i41.tinypic.com/fom4vo.jpg
http://i42.tinypic.com/678n5z.jpg
http://i40.tinypic.com/zklwtg.jpg