Believe Remington legitimized the 7mm-08 about 1980. Of course, it was a well known
wildcat cartridge prior to that. As I recall it wasn't until a year or two later that Savage
chambered it in their model 99C. A quick call or maybe an email to Savage should
confirm things easily enough. What would trouble me or make me suspicious is if the
cartridge stamping on the barrel is in the different script/lettering as you noted. That's not a good sign. As noted on the auction websites, "caveat emptor". [:-]
Well, I just took a look myself out of curiosity. As suspected, it's a 99C which was the
last model 99 made by Savage, I beleive, before they finally discontinued the 99s.
I don't see a problem with the script ref. the barrel markings, but maybe I'm missing something. The seller has a lot of positive feedback noted (only one negative), and that's a very good sign. Also, the serial number is given (except for the last three or so
digits as is common). Again, a quick check with Savage should confirm things if needed,
and that's something any bidder/buyer can do first.

Here's a link to the gun on GunBroker.com:
http://www.gunbroker.com/Auction/Vie...?Item=27770218