I'll guarentee it's not SW also, it's entirely plastic bodied, and not at all like anything SW ever made. SW was never shy about putting their name all over the stuff they produced either. This isn't in any vintage SW catalogs either, because it's for sure not an SW piece. I was thinking it could be a RAC Tach, as I've seen similar plastic bodied tachs made by RAC, but they usually carry a logo or some identifying marks as well. This one right now is anyone's guess. I'll let you know if I decide to crack it open to get a look at the guts, just thought someone here may have seen another at one point...guess not.
