4 3/4" height / pin on reverse

An unusual design that I've never encountered before.

After the 10th was mustered out the new recruits and
the re-enlistments were transferred to the 37th regiment.

Organized: Hampden Park, Springfield, MA on 6/21/61
Mustered Out: 7/6/64 at Springfield, MA

Officers Killed or Mortally Wounded: 10
Officers Died of Disease, Accidents, etc.: 1
Enlisted Men Killed or Mortally Wounded: 124
Enlisted Men Died of Disease, Accidents, etc.: 55
(Source: Fox, Regimental Losses)