1. IOR/X/14480 Reference (shelfmark): IOR/X/14480 Title: RAF Mercator Plotting Chart. Scope & Content: Mercator projection, scale 1:3,000,000 at 15° North. Series PM3. Directorate of Military Survey, Ministry of Defence, U.K. Collection Area: Map Collections Languages: English Date Range: Unspecified Extent: 1 item