The frame looks just like the mid-70's GR I used to own, so that's what I'd say it is. GJs of the same vintage were silver w/red. Too bad about the original graphics - they were paint, not decals. In this part of the world, $350 for an all-original GR is a better-than-fair price, but with the non-original derailleurs and cosmetic damage, it'd be an OK but not great price.