What’s New...
  June 2017
  Bruno Appelt page added
   
  May 2017
  Johann Starck page added
   
  April 2017
  Steidtmann & Roitzsch update
  F.E. Hertel & Co. update
   
  March 2017
  Transversal scale 18th c. Paris and Vienna
   
  January 2017
  update French dotters (pointilleurs)
  Jules Dupuit chartometer early 20th c.
  German drawing set early 1700 [11]
   
  November 2016
  Kraft & Sohn page update
   
  October 2016
  Dutch brass protractor 1750-1800 
  Ertel page update
  Kern Aarau page added
  Amsler planimeters page update
  Oldendorp planimeterzirkel
   
  August 2016
  Haff page update
   
  July 2016
  Reisszeugfabrik Hertel Neu-Coswig Dresden
  Schoenner page update
  Lipkens page update
  K+E page update: catalogues / references
   
  June 2016
  Fritz Hölbe drawing set
  Alwin Berger drawing set
  Gluysteen gauging slide rule
  Albert Lepetit optical square
  Richter proportional compass
  Dennert & Pape azimuth slide rule
   
  March 2016
  Dutch brass protractor 1750-1800
  Ertel & Sohn Kilometerzirkel
   
  February 2016
  Essling protractor early 1700s
   
  January 2016
  19th c. surveying textbooks
   
  November 2015
  Dutch brass protractor 1750-1800
  Breithaupt geological compass ca. 1850
   
  August 2015
  Großberger & Kurz drawing set ca. 1900
   
  July 2015
  Pieter Bayens protractor early 1800s
  Ertel & Sohn double optical square
  Lotter Ellypso 1 ellipsograph
  Richter double drop bow compass
  Hommel-Esser beam compass no. 3640
  Picard perspective drawing device 1895
   
  April 2015
 

Swiss nickel-silver set 3rd quarter 19th c.

  German geological compass mid 19th c.