- catalogue number: 3.2019416;
- name of artifact: ball spherometer, 6-cm diameter X 6.2-cm height, three legs;
- date of production: ca. 1900-1950;
- materials of manufacture: brass, with some nickel plating(?), and black enamel(?) paint;
- maker: manufacturer “NO”, England or continental Europe?
- provenance: i) purchased on eBay by the museum Director, from a vendor in England;
- condition: restored by museum director;
