Map, One inch map Popular Edition, 4th edition, sheet 132, Portsmouth and
Southampton, Hampshire, scale 1 mile to 1 inch, by Ordnance Survey, Southampton,
Hampshire, 1919 corrected to 1929, published by the War Office, London,
1931.
The OS map is overprinted with a grid, this is the Modified British System grid,
used from 1927, which developed out of the British Grid System adopted earlier,
1919, by the military; this is NOT the National Grid Reference system.
dimension:-
scale = 1 to 63360 (nominal)
Map Group -- OS 1920s Popular Edition -- with Research Notes