Comment by Aquitard

Im always on the lookout for these kinds of antiques. Many years ago I visited an antique store who were selling a 1916 brunton (geological instrument with compass and clinometer). It now sits amongst my rock collection.

One day I hope to find a late 1800s automatic groundwater datalogger. Think of a seismometer that sits on top of a groundwater well to measure water levels. It would be a dream find for me.