Naval Special Warfare Group 8 Training Detachment Challenge Coin. 2.0 Inch. Copper. Naval Special Warfare Group Eight. Navy / Naval Special Warfare. Pre-owned collectible challenge coin featuring the Naval Special Warfare Group Eight Training Detachment theme. One side features Naval Special Warfare Group Eight Training Detachment imagery. A distinctive collectible for U. Navy, Naval Special Warfare, military and challenge coin collections. Small scratches, finish wear or other age-related marks may be present. Please carefully review all photographs. The photos show the actual collectible item you will receive. This listing is for a pre-owned collectible challenge coin only. It is not legal tender and is not offered for identification, authorization, military access or official-duty use. The exact issuing history, licensing status or official-issue status is not guaranteed unless specifically stated.