Whether the button is from the time of the Civil War, however, will require the insite of an expert on buttons sold to the U. S. Government during those years. All data considered, however, it is most likely that Linda has indeed found herself a nice little "piece" of American Civil War history.
I forgot to ask Linda what the size of the button is. The size will tell if the button was a small cuff button or the much larger one for closing the blouse.
Linda is to be congratulated for finding such a nice piece of American history.
Jim
JAMES D. DREES