Ancient Order of the Shellback Patch - Veteran Owned Business U. S. Navy Ancient Order Of The Shellback Patch - 'Old School' version shellback patch 4 1/2" round patch with 00 degrees, mermaids a trident-wielding Neptune and anchor. Very colorful patch, iron On Backing Great Detail and stitching - Great for a jacket or vest Excellent gift for a Shellback Veteran - Show your pride for crossing the line! HatnPatch Is THE Veteran Owned and Operated Business - Retired Marine - We Ship Your Order Within 24 Hours And Usually The SAME DAY!