3 Coin Series Presented In A Custom RCM Metal Case. World Wide Mintage 7500! Coin 1: The Royal Aircraft Factory S. 5a, Coin 2: Sopwith Triplane & Coin 3:The Curtiss H-12. A Great WW1 Themed Collector’s Series & Airplane Enthusiasts Must Have! Packed & Ready For YOUR Enjoyment! Aircraft technology was barely a decade old […]