I thought the S in "S540" meant Sabre? From the serial number I had figured it was a '90, but looking through the catalogs, I didn't see that bridge appear until '91, so I sort of figured it was manufactured in '90 for sale in '91, but I wasn't really sure, and didn't see a comparable finish. Thanks for the "FM CW" idenfication. The finish really is a beauty.
Anyway, I paid US $500 for it. Guess I did alright. It's got a few small dings on it, but I bought it to play it rather than to sit around collecting dust, so that doesn't bother me. I sort of wish the tone was a little more "metal" but, then again, I've got RGs for that, and it's good to have some variety. The single coil pups are a little bit quiet. Had this guitar for less than 24 hours, but it's really growing on me. This is the first S that I've really liked compared to the RG line, seems most of the others I can remember running across have had a thicker neck, or various other things that turned me off, but this one's great.