I photographed this Sperry K-3 Computing Gunsight at the Frontiers of Flight in Dallas. This was the sight used in the B-17 Top Turret and would have been what my grandfather used when he flew with the 447th BG.
I photographed this Sperry K-3 Computing Gunsight at the Frontiers of Flight in Dallas. This was the sight used in the B-17 Top Turret and would have been what my grandfather used when he flew with the 447th BG.