ID:
2538
Maker's Name:
Weston Electrical Instrument Corp.
Where made:
USA
Dimensions:
15.5 × 3.2 × 5.8 cm
Two Weston shunts and two from an unknown source.
Shunts are used to increase the range of an ammeter by diverting most of the current around it in a controlled way.
See markings on 5A shunt.