This French engraving shows King Louis XIV of France acknowledging James VIII & III as king of England. Louis supported the exiled Stuarts both for reasons of pragmatism and principle. A Jacobite revolt would have crippled Britain's ability to fight…
Knob from 1 to 10 below which is engraved ' Multi-point thermocouple indicator / 54131 '. Scales: 1) 0 - 100; 2) 50 - 0 - 50 both in divisions of 1 mA? With bridge resistor logo.
Selenium rectifier with black cooling fins. Every fourth sheet has a hole in one corner while all other corners have been taken off. The central rod has screw terminals at either end.