
Title
An electric helicopter with a9 h
Caption
Engraving depicting an electric helicopter with a 9 h.p. motor. Dated 20th Century
Date
20th century
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP23A14_437
License type
Rights managed
Available size
60,0Mb (6,5Mb) / 17,2in x 13,5in / 5160 x 4064 (300dpi)