Royal Museums Greenwich
Dallmeyer No.3 Photoheliograph
The Dallmeyer No.3 Photoheliograph, in use at the Royal Observatory, Greenwich until 1910. Repro ID: B1636-17A ©National Maritime Museum, Greenwich, London. Purchased from the RGO in 1980
Repro ID B1636-17A © National Maritime Museum, Greenwich, London. Purchased from the RGO in 1980
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