Nice die sinker!
Info on these here...
http://coinhelp.net/civil-war-token-values/civil-war-token-die-sinkers/
Die types on this page.
http://coinhelp.net/civil-war-token-values/attributing-civil-war-token-dies/
Looks like the flag side is die # 214
The DIX side appears to be # 416
Made by the Waterbury Button Company....
Waterbury Button Company
Dies: 141, 168, 203, 204, 205, 206, 207, 208, 209, 210, 212, 214, 219, 220, 221, 223, 224, 225, 225A, 226, 226A, 237, 239, 247, 307, 311, 320, 321, 322A, 323, 324, 325, 326, 327, 328, 408, 409, 410, 411, 412, 413, 413A, 414, 415, 416, 421, 422, 423, 449, 450, 471.
Founded in wartime in 1812, The Waterbury Button Company has been making stamped metal buttons for over 200 years. They have amassed approximately 40,000 different button dies, each a work of art. Interestingly, they made the buttons worn by both Ulysses Grant and Robert Lee at the Appomattox Courthouse.
For a period of time, they are assumed to have made Civil War tokens. These tokens are unique in that one side tends to have a brass-toned appearance and the other a copper-toned appearance. The tokens are typically large and well struck with raised rims. They were made in large quantities and spread across the Union.