Digital Images Archive
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Popular Edition Sheet 144 Plymouth with British System Grid.
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Specimens of sheets with the original British System grid, in which references repeated every 50 km, are uncommon, whereas those with the Modified British System are well-known. It seemed useful, therefore, to present an example so that all the details of the grid overprint can be seen. This particular sheet appears to be printed on a form of waterproof paper, despite it predating by some years the introduction of Place's Waterproof Paper on civil maps. Now deposited at Cambridge.