Originally posted by MartinJ.:
The Yamaha that I referenced in my post was a 1977 grand, I can't recall the exact model number but I thought it was a GH1 (could it have been a G1 or GC1?). It had what I'd describe as a satin finish as well, a soft-black "pleasantly scratched" up look to it.
The GH1 was produced for a very short time, all date from around 1989-1995 or thereabouts. I think all were polyester. The GH1 was beset with problems and was replaced by by the GP1 which was not much better. The GA1 was introduced to replace that, and some of these are known to be unsuccessful. The GA1 is now superceded by the decent little Indonesian built GB1.
Your 1977 piano was most likely a G1, a far
better instrument than a GH1 in spite of being an earlier design.
The GC1 is a new model built only in the last couple of years and is excellent, being a stripped-down Conservatory series C1, so it couldn't have been one of those.