Welcome! I moved this down to the Vintage Centerfire board to ensure Mad Dog would see it. He's our resident 99 expert. So which shop in NW Ohio did you pick this up at? Aside from Jaqua's up in Findlay I don't think I've ever seen a 99 sitting on a dealers shelf in our neck of the woods. I did pick two up at the Lima gun shows last year though, one a 99F Takedown and the other a 99EG - both in .300 Savage.

I'm going to venture a guess on the D.O.M. being either late 55 or 56.