VTG HOFFRITZ COMBO Opisometer Compass Map Mileage Converter Pencil & Case

Description

BIDDING ON A VINTAGE HOFFRITZ COMBO
Compass,
Opisometer, Map Mileage Converter, LEAD Pencil & ORIGINAL Case. THINKING CIRCA 1940-50.
HOFFRITZ GERMANY
HOFFRITZ MULTI MAP READERS TOOL, COMPANION.  OLD COURSE PLOTTER TOOL.  MECHANICAL TRAVELERS HIKERS MULTI-TOOL
USED, NO OWNERS ID MARKINGS.  VERY COOL ITEM.
NOTE: STRESS LINE, HAIRLINE IN LEAD PENCIL CASE, SEE LAST PIC ESPECILLY. DOES NOT EFFECT PENCIL OPERATION
A simple opisometer consists of a
toothed wheel of known circumference on a handle
. The wheel is placed in contact with the curved line to be measured and run along its length.
An instrument used for measuring curved lines (as on a map) and consisting essentially of a screw with a wheel-shaped nut that is made to rotate forward along the curved lines and then backward to its original position on the screw along a straight scale.
MEASURES:
INCHES TO MILES
CENTIMETERS TO KILOMETERS