Posted 1 year ago
This is a field clinometer made by Keuffel & Esser Co., New York in the 1920's or 1930's era. This tool was used by surveyors to measure slope. It is black painted brass and has a leveling bubble. The only other one I have seen is just the 4" x 4" square section. This one is mounted to a solid brass surface plate. UPDATE - Found this item listed in the 1913 K&E price list as product# 5805. Also listed in the 1921 K&E catalog.
The attached surface baseplate is from the item#5810 bubble level so I believe this was special made by a Keuffel & Esser machinist.