Civil War Non Dug Michigan State Seal Coat Button

Non dug Civil War Michigan State Seal staff coat button. It is a non dug 3-piece gilt brass button. The front has a nice patina and good detail. The reverse has a, c.1860, small depressed GODDARD & BRO . * . EXTRA . * ., between two rings, backmark. The shank is straight. It shows some gilt/use wear and measures 22.5 mm's in diameter. This is a good Northern state button. $175