Neusilber resistance block, 1869
An Neusilber resistance box, 1869 with serienumber 1316 It is marked “richtig bei 20 grad Celsius”.
The two halves are identical, and have resistances of 1000, 100, 10 and 1 ohms. This curious arrangement of values suggests that this might have been used as the two ratio arms of a Wheatstone bridge. The tapered connection plugs extending to the left may be inserted in each of the brass connection blocks.