I found this button a few years ago not 30 yrds from my front door. The button is in such pristine condition that I jumped at the first hint of a modern history. At the time I labeled it as 1913...I think because that was the first year of our modern national guard...but I'm not even sure of that. After I found a CT civil war officer's button last week I took this other one out and dig some internet digging. The Ridgeway site says that this button is another CW officer's button. These units were formed to shore up the existing units...(?) The back mark is Scovill Mfg Co Waterbury. Any info would be greatly appreciated.