This is a Walt Woodard Argentine Snaffle Bit with a 5 1/8" sweet iron snaffle mouthpiece with copper inlays. The cheeks measure 6" with snaffle rings.This is a level one bit by Metalab with a stainless steel finish.

Argentine Bit

5 1/8" Mouthpiece

6" Cheeks

Level One 

Stainless Steel