With these very old bags, I always worry that someone could very easily make a metal Coach tag and slap it on a bag, or take an authentic tag from a really trashed bag.
Do you recognize the style?
item: VINTAGE COACH SADDLE BAG NAVY BLUE HANDBAG NEW YORK CITY PRE SERIAL # METAL TAG
seller: billybblue
http://www.ebay.com/itm/VINTAGE-COACH-SADDLE-BAG-NAVY-BLUE-HANDBAG-NEW-YORK-CITY-PRE-SERIAL-METAL-TAG-/131174803804?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2047675.l2557&nma=true&si=eBt95m1tXxuUNo9Y1d8TWXOaOUk%253D&orig_cvip=true&rt=nc
If Tetondeb is around, maybe she can take a look.
What worries me is that "top grain cowhide" stamp especially since it's gold. And the styling is too close to a Crescent Bag without having some of that style's details to make me comfortable with it. But I've made mistakes about early Coach styles before so I'm not going to claim any expertise in this case.