Celestial navigational globe. Astronomical details on the sphere show stars represented by dots of various sizes and marked by their Bayer notation. A magnitude table is lacking. The constellations are represented by contour areas and some of the stars are connected by lines. A total of 19 stars and one star group are named. There are areas with names of the 48 Ptolemaic constellations and two non-Ptolemaic constellations. Nine of the southern constellations of Plancius are represented, as are two of Hevelius and three of Lacaille.

The inventor of this celestial globe, Herbert Edward Purey-Cust (1857-1938) was a Royal Naval officer who was Hydrographer of the Navy from 1909 until 1914, when he retired. He became a Rear-Admiral in 1910 and an Admiral on the retired list in 1919. The instrument was used in conjunction with a star chart he published in 1897. For full details about the cartography and construction of this globe please refer to the published catalogue: Elly Dekker, Globes at Greenwich (National Maritime Museum and Oxford University Press, 1999)