Okay, so I want one. An SW77, that is. But I can't afford a new one, so
I'm going to be buying used. I understand that there were improvements made
around 1994, and the new models had serial numbers in the 900,000 or 47,000
range. So far, so good.

But then I read that there were more improvements made in 1997. Can anyone
tell me what serial numbers identify post-1997 models? Or other identifying
characteristics?

Thanks,
Sean