A small Pocket envelope of 5 3/8" x 2 3/8" holds the slightly smaller Cryptography Card which opens out to 5 3/8" x 4 3/8"....in two parts …. not joined....as per pics very clean and tidy for age. I can not find a single one of these for sale on-line...they are all in museums, libraries, or collections.
From my research it appears that Three Editions of the card were printed between 1870 & 1873. A rather rare and very collectible item.
Rear Admiral Sir Francis Beaufort, KCB, FRS, FRGS, FRAS, MRIA (/ˈboʊfərt/; 27 May 1774 – 17 December 1857) was an Irish hydrographer and officer in the Royal Navy. Beaufort was the creator of the Beaufort Scale for indicating wind force.In 1829, Beaufort was elected as a Fellow of the Royal Astronomical Society, and at age 55 (retirement age for most administrative contemporaries), Beaufort was appointed as the British Admiralty Hydrographer of the Navy. He served in that post for 25 years. Beaufort converted what had been a minor chart repository into the finest surveying and charting institution in the world. Some of the excellent charts the Office produced are still in use today.
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