Beautiful Non Dug Civil War New York National Guard Coat Button RMDC Backmark

Beautiful non dug Civil War New York Excelsior National Guard N. Y. S. A. coat button. The front has great gold and detail. The reverse has a desirable 1850's RMDC HORSTMANN BROS. & ALLIEN backmark. The shank is straight. This button measures 21 mm's in diameter. $50