Panama Canal, effect on Ocean Routes, chart, 1920.

"The Panama Canal" with the effect on Ocean Routes and map of the Panama Canal. Large chromolithographic map published in Philips' Mercantile Marine Atlas, 1920. British Empire shown in red. Inset plans of Colon Harbour and Panama Roads. Light crease across both lower corners, centrefold as published with slight age browning down fold. Size 66 x 50 cms plus margins. (Note - this is a digital camera image with uneven lighting.) Ref E7003