Rare Massachusetts Coast Guard 1861 Civil War Coat Button Albert's MS 43

Rare Massachusetts Coast Guard 1861 coat button. It is listed in Albert's as MS 43 and in Tice as MS256. The front has a spread wing eagle surrounded by MASS COAST GUARD 1861. The front shows use wear. The reverse has a, c.1861, depressed D. EVANS & CO. * ATTLEBORO. MASS.* backmark. The shank is straight. This button measures 22.5 mm in diameter. $450