This map measure from Fritz Chatelain of Neuchâtel, Switzerland, was sold by Lawrence & Mayo in the early 20th century. The accurate and high quality instrument was later called the 'Universal Map Measure'.
The Russian made KY-A Curvimeter was made for both the civilian market and the Red Army at the fabled Zlatoust watch factory in the 1970s. Cheaply made from plastic and metal, it is a robust and reasonably accurate instrument.
The Minerva Curvimeter, model number C-01, is a beautifully crafted Swiss made map measure with one of the smoothest tracking mechanisms to be found on this type of instrument. This is unsurprising, considering this measure was made by a company skilled in producing high-quality watches.
This month's map measure was released by Panerai for the Classic Yachts Challenge in 2007. Produced as a very limited edition, a small number were also available on general sale, in particular, to collectors of all things Panerai, the 'Paneristi'.