German "Birka" thermo-electric "wire-type" (no bimetal) relay in vacuum tube
German "Birka" thermo-electric "wire-type" (no bimetal) relay in vacuum tube, smallest standard size no.602
Details
- Category:
- Electricity Supply
- Object Number:
- 1932-394
- type:
- relay
- credit:
- Birka Regulator Co.