It is a P-47, not Sig. I don't know of any Sig models with fibreglass fuselages. I don't recall any P-47s from any manufacturer with a fibreglass fuse from the late 1980s early 1990s (this don't mean much). If you like WW2 warbirds, have at 'er. If you can't determine whom made the kit, it doesn't really matter as they likely are out of business, anyway. Sorry, I'm really not much help, am I! A little more describtion might help. Built-up or foam wings?