Thanks BeenBurned! I appreciate your info and opinion. I just measured my bag and its neither of those approximate measurements- my bag is 17.5'' L (at its widest point, the top), 11.5'' H, and 6'' D. It's pretty big, and my measurements aren't drastically off from the 24341, so it must be true to the tag and be a 24341. It's definitely not the 25663, which seems much smaller. The trouble is still that all the 24341's I've seen are side-to-side dog leash clips, and all the 25663's I've seen are front-to-back clips. So I've got a 24341 sized-bag, with a 25663 style clip!
Originally Posted by whateve
The fact that we are seeing plenty of bags with each variation makes me believe both are authentic but I've never seen either IRL. The version I'm seeing at on Coachfactory.com now has what you refer to as a horizontal clip. A clip that direction is used in larger bags to cinch the sides of the bag in to make it appear smaller and change the shape, while the vertical clip is just used to make the contents more secure.
Hi whateve, thanks for your input! I've never seen one in real life either before, and I don't have a Coachfactory.com account, and of course coach.com no longer carries it, so I don't know what other solid reference I can depend on despite the knowledgeable folks here!

Honestly it doesn't seem like the kind of bag that would be particularly appealing to counterfeiters to make copies of, I don't think it was that popular or recognizable. And as you said, there's a lot of bags with the variation, so it could be a legitimate variation. The bag is very well-made, looks neat and sturdy, so I'm inclined to believe it's genuine.
I just got it off eBay and the positioning of the dog leash clip was bothering me. Maybe someone here also has the bag-- which way does your dog leash clip go? Also, does the serial number check out? I've never seen one beginning with "C1" before. Thanks!