interesting Eagle sporran

[MacCathmhaoil]

The eagle may appear similar to American depictions of the same era perhaps, but the pattern on the shield makes me think that's about where it ends! The pattern gives the impression of a more European flavour than American. As well were it an American eagle I'd expect it to be clutching a scroll or a sheaf of arrows, not alit on the shield border. I think this is in all likelihood a Scottish made sporran that was made for a Scottish client, can't really see anything to make me think otherwise.
There was a lot of unassayed sterling silver that was produced in Victorian/Edwardian Scotland so silver without hallmarks is not uncommon. That being said, any jeweller or reputable dealer is capable of doing an acid test to verify silver content.
His prices are a bit unrealistic, many times what I think may be reasonable.