Royal Naval Patrol Service.

White metal badge with original brooch pin fitting and registration number to the reverse. A shield bearing a shark and two sea-mines caught in an anti-submarine net surmounted by a Naval Crown within a roped border bearing, " M / S - A / S." Worn by the men of the Mine Sweeping and Anti-Submarine patrols stationed at the "Sparrow's Nest " at Lowestoft Suffolk.

Code: 31603