this is not the preproduction RS1 in your list?
Yes it is!
The model year is 1991 but the project begun in 1988 when Gary Fisher met Mert Lawwill.
The bike was initially assembled in a different way and was used as a prototype.
You can see now the final assembling before the bike was sold (probabilly in late 1990).
This bike was the most important bike in a Californian bike store museum
1994 Sea & Sky Klein Attitude
1995 Otis Guy Softride USA by Brian Bayliss ;1996 GT LTS Thermoplastic
1996 Aviotech Fiocco Light
1998 Gary Fisher Joshua (FOR SALE)