Caspar Specht worked in Utrecht from 1684 to 1708 as a draftsman, engraver and publisher. He has not published an atlas himself.

The Ottens Family

Joachim Ottens (1663-1719), was a copper-engraver and the founder of the print- and mapsellers’ firm in Amsterdam. In 1710 he became a member of the art- and printsellers guild. After he died in 1719, his widow and the sons continued the business under the name “In de Wereldcaert” (In the world map). On the whole, the Ottens’s financial position was rather weak, and the stock was not very large.
In a notary contract dated 20 October 1726, the partnership between the two brothers, Reinier and Josua, was stipulated. Despite separate shops, the brothers’ partnership continued until the death of Renier in 1750.
After Joshua died in 1765, his widow continued the firm, together with her son, Renier II, until c. 1780.
The firm flourished mainly between 1719 and c. 1750. In that period, they advertised at various times the publication of new maps.
Ottens’s greatest fame comes from the voluminous atlases assembled to order. A small number of these so-called ‘Atlas factice’, splendid copies with gorgeous illumination, have survived. These collector’s copies are known to exist in 2, 6, 8, 11, and even 15 volumes. Ottens also published atlases in one volume, with a varying number of maps, pocket atlases, collections of military plans, and Renard’s atlas de la navigation.