That is indeed a spectacular label!
What an obscure rarity it surely is.
So bright and well preserved too.
Hard to peg though, you're right about that, but Ogden's is a very good guess.
Otherwise I'd reckon it to possibly be a house brand offered by Joseph Fleming - you'll find a few of his branded ginger beer bottles on the google search, and I found a really great calendar as well but the pictures are quite small:
https://www.worthpoint.com/worthopedia/original-antique-military-sea-forth-512331943
Another passing thought is that since he's near the Lakeland that perhaps it was made for him by one of the Kendal makers?
Thanks for sharing such a nice find!