US Artillery Button

Federal Artillery Button, eagle with "A".  Button depicts eagle facing right with "A" in the shield, generally for artillery officers.   Backmark:  "(star) WATERBURY" remainder of backpack is worn.  Dm inner ring of short hyphens (square dots) transitional use ca 1860 to post war.  Two part convex button, cuff size.  Shank is broken. 

Reference: Albert AY78 /79, Tice AY215

Inventory Number: BUT 034