Keuffel and Esser Paragon engineers ruler

In collections

Details

Title: Keuffel and Esser Paragon engineers ruler
Date: 1960 (approximate)
Original Format: photograph: print
Description: 12″, wooden, 30 & 60 scale.
Collection: Scientific Instruments
Caltech Archives ID: ST-GH-047
Copyright: The Caltech Archives has not determined the copyright status of this image.