The perfect example! This button is non-dug, retains 100% gilt, has a straight-up shank and a very legible "D. Evans Co. Superfine" backmark. This backmark is perfectly appropriate in a Civil War collection. It was used on cuff buttons beginning in 1861 through the late 1860's. This is true of many Civil War and even pre-Civil War backmarks. The only backmark NOT appropriate in a Civil War collection is one that was used exclusively after 1865. So have no worries that this represents a "postwar" button. I've seen more than a few dug "D. Evans Co. Superfine" backmarks on cuff buttons recovered at Civil War site.

 

I currently have about two dozen cuff "I" buttons with this mark, an "A" or two as well -- but this is my only "C". If you want a cavalry cuff button that's a real screamer, here you go!