A selection of scientific testing equipment including a Weston direct current milliammeter model 1 No. 52167 from early 20th century, a vintage Beckman model RN-1 Wheatstone Bridge, a vintage Biddle-Gray Corp. potentiometer serial number 31325, and a vintage Weston model 785 Industrial circuit tester circa 1942 -1950.
|Brand:||Beckman, Weston Electrical Instrument Corp., Biddle-Gray Corp.|
|Marks:||Maker’s Mark, Model Number, Country of Origin|
|Working Condition:||Not tested|
- to fair. Items are untested and sold as is; surface scratches and wear from use are evident; items might benefit from a light surface cleaning; please see photos for condition.
- measurements of Biddle-Gray potentiometer only.