This object sits on a heavy metal base with a manufacturer’s label attached to one corner. There is a vertical cylinder on top of the…
This is a cylindrical gauge with a circular dial on top covered with a circular glass cover. The body of the gauge is metal, perhaps…
This instrument consists of a wooden base, to which various components are attached. The components on the instrument are mainly painted dark green. The components…
A 10″ slide rule made of PVC with grooved rule and ridges on the slide. There are stainless steel stops on both sides. The cursor…
This is a disk-shaped instrument with a glass top cover set in a silver-coloured metal rim. Under the glass cover is a face with a…
An elongated horseshoe magnet is mounted on a vertical wood backing. The magnet is protected with a modern plexiglass case (later addition – not shown…