I have just rediscovered my old Mountain guitar packed away in the cupboard. It is a CF model W400D serial No. 608310.I bought it about 1974 and has hardly been used. It has the Mountain logo down the headstock and inlay down the neck between the frets all in what looks to be mother of pearl.The top seems to be a light spruce with mother of pearl inlay to outside edge and around sound hole.The neck,sides and back are dark timber.The back is in 3 sections.It's in the original case also.I was told at the time that I bought it that "The Eagles" used these guitars for the accoustic work on "hotel California" but cant verify this. Maybe somebody can check this out.