M110 8 Inch Self-Propelled Howitzer Hat or Lapel Pin. The pin is approx 1 1/4" wide, antique silver (matte) and have 2 posts to keep from turning like single post pins. 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 Self-Propelled Antique Silver U.S. Howitzers ever made. SHOW YOUR PRIDE!. Great Gift Idea for ANYONE. HatnPatch Is THE Veteran Owned and Operated Family Business - 2 Generations of Retired Marines - We usually ship your order within 24 hours; and many times The SAME DAY!