Interesting, lungimsam! I thought you were talking about a new one, but this is a vintage one. I've never met a vintage Yamaha that was anything but stellar build quality. However, I see your points. I seriously doubt those inlays are stick ons. They may be MOTS (mother of toilet seat) as opposed to pearl, but If they're not inlays I'd be shocked. As for the cavity covers, are you sure they're not corroded metal? If they're really some kind of paper board, that would be pretty cheesy!!! Anyway, let us know what you find out.