A pair of terrestrial and celestial table globes, Gerard and Leonard Valk, Amsterdam 1750

of papier-mâché and plaster, the maps copper engraved and coloured on paper, mounted in brass and supported on original stands of ebonised wood and oak, the brass rings numbered 4 respectively 5, the stands matching, varnished, both globes missing brass dial and hand on top

Globes in overall yellow condition from varnish, presumably restored, losses repaired on celestial globe, the stands varnished, splits to both horizontal rings.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Traditionally an engraver, Gerard Valk (or Gerrit Leendertsz Valck) (1652-1726), set up in the map business in 1679 in partnership with his brother-in-law Pieter Schenk, acquiring copper plates from a variety of map dealers and sellers. Around 1700 Gerard moved to the centre of Amsterdam, took over premises once belonging to Jodocus Hondius, and was taught the art of globe making by Pieter Maasz Smith. In 1711 Gerard's son Leonard (1675-1746) joined his father in the globe making business and together they produced terrestrial and celestial globes. Interestingly they did not rely on existing copper plates of the 'old school' but instead designed a totally new pair of globes based on up-to-date astronomical and geographical information. Gerard and Leonard Valk were the only publishers of globes in the Netherlands during the 18th century.

After Leonard's death the firm continued under the leadership of Maria Schenk. Towards the end of the 18th century the globe factory came in possession of Cornelis Covens (1764-1825).