Title

Photograph showing one of the world's smallest water-cooled valves, being compared with a large one

Caption

Photograph showing one of the world's smallest water-cooled valves, being compared with a large one. Dated 20th century

Date

20th century

Credit line

Photo12/Ann Ronan Picture Library

Reference

ARP23A18_239

License type

Rights managed

Available size

60.0Mb (2.7Mb) / 12.6in x 18.6in / 3767 x 5567 (300dpi)

Keywords

Photograph Photography Black and White Black and White Photograph Black and White Photography Radio Radio Broadcast Broadcast Broadcasting Radio Waves Radio Technology Wireless Water-Cooled Valve Valve Water 20th Century Photograph Photography Black and White Black and White Photog