M101A1 105mm Towed Howitzer Hat or Lapel Pin. The pin is approx 1 1/4" wide, antique silver (dull) and have 2 posts to keep from turning like single post pins.
There are ONLY 50 initially available so order soon as there is no limit per person and some are planning to order for their entire gun crews.
As far as we know, these are the first Split-Trail, Towed U.S. Howitzers ever made.
