Is anybody familiar with this button backmark?

[Mud Hut]

I am striking out on finding info, Thanks.

 

Amazon Forum Fav 👍

A Handbook of Civil War Bullets and Cartridges - Grab it through Amazon!

[flinthunter]

Here is a past TreasureNet post about a Sporting Designs button. http://www.treasurenet.com/forums/today-s-finds/627443-sporting-designs-button.html