Friedrich Wilhelm Breithaupt (*1780-†1855), Kassel.

Breithaupt; successive generations of instrument makers, established by Johann Christan Breithaupt (*1736-†1799), succeeded by son Friedrich Wilhelm Breithaupt (*1780-†1855), then by his son Georg (I) Breithaupt (*1806-†1888). 


Brass protractor by Breithaupt ca. 1820.

This brass (possibly silver) protractor signed F. W. Breithaupt in Cassel can be dated to sometime within the first quarter of the 19th century, before Georg joined his father F.W. in 1827, and before the company name F. W. Breithaupt & Sohn Cassel was entered into the Handelsregister in 1832. 

Protractor measures 102.5mm at base, and 63mm from base to apex.





Breithaupt geological compass ca 1850.

Brass compass, diameter 68mm.

PAS, J.B. te; F.W. Breithaupt & Sohn GmbH & Co. KG, Kassel, Germany. Bulletin of the Scientific Instrument Society, No. 54, 1997, p.26-27. 

Online illustrated catalogues (click on image for link)

      F.W. BREITHAUPT & SOHN, 1846.           F.W. BREITHAUPT & SOHN, 1867?              F.W. BREITHAUPT & FILS, 1891.             F.W. BREITHAUPT & SOHN, 1905.