This image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
License this image for commercial use at Science and Society Picture Library
Switch socket, tumbler type, pear shaped, patented 1912. Pat.No Science Museum Group © The Board of Trustees of the Science Museum
Switch socket, tumbler type, pear shaped, patented 1912. Pat.No.6673,1912. Rd.No.629181