I've got a vintage strop, not seal though. Nothing special with the strop and there are others I use before that one. I also know I don't approve of how seals were hunted and killed.
For my money I would go with an SRD Bridal or latigo. I use the bridal strop almost daily and the latigo is CarrieM's so I just sneak a use here and there. Just kidding, I like the Bridal a touch more but both are great strops.
Hey Joe -- easy does it with that bridal strop, do not leave any marks on her.