Robert McCall Military Helicopter Sikorsky Piasecki HUP United Aircraft 1955 Ad
Navy’s Sikorsky HSS / H-34 and Piasecki HUP. Sikorsky Twin Engine HR25 / H-37. Sikorsky H-19 and Bell H-13. Sikorsky HRS. beautifully illustrated by Robert McCall. A wonderful original 2-page magazine ad from 1955 by.