Set of Antique Fighting Cockerels

I saw these come in to a charity shop I volunteered at for a while. The lady who brought them in told me they were worth a bit and just needed a bit of a polish.

I believe they're made of brass, they're quite substantial heavy, and have adjustable wings.

I've roughly measured them:

23 cm high

13 cm deep

18 cm wide

Personally I think they look like Lot#: 26388878

on this webpage: http://www.globalauctionguide.com/south-carolina-auctions/fine-estate-of-the-honorable-donald-russell-s-270484.html

I literally know nothing about antiques. I bought them because they look cool but just curious about their worth and history really. Any comments would be helpful!

Good