Reproduction USMC Vietnam era and post Vietnam era, Sniper School at Quantico Virgina . 
Size is 3 1/2 inches round. this patch is made in Vietnam in the local machine embroidery style on a cotton twill backing.  Sniper School Quantico is embroidered in white thread HRT is in purple thread, center globe/skull is yellow thread.
Listing is for 1, stock photos show front and back.
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Store use only
Rack 7, Shelf C