First, it's NOT a new old stock (NOS) watch. The case has been lightly restored by somebody who certainly knew what they were doing though so it's only a minor knock IMO. The scratches under the lugs are probably from strap changes. I hate the grossly misused term NOS - it's almost as over used as RARE on eBay, and this seller does use both words in his description, albeit "rare in this condition" and "almost NOS" so he doesn't deserve my full scorn.
Second, the font of AUTOMATIC looks a bit off to me so it might be a high quality redial. There also seem to be quite a few redialers who have a good die for
International Watch Co SCHAFFHAUSEN. Color me skeptical. I'd have to see it in person with a loupe to be sure.
A few of us have bought some really nice watches from Hungary but you are correct to be a tad wary. And with 5+ days left it's going for a tidy sum already. A very nice 18ct IWC automatic from the 60's recently sold for almost $2300.