Mills 12 watt audio resistors
		Some values maybe marked MRB-12-NI-CU
		which were later changed to MRA.
		Construction is the same and maybe considered vintage Mills.
		There are 3 variations made by Mills:
		Dull black coating
		Shiny black coating
		Semi-gloss red/brown coating
All are 1% tolerance
		-
		The Central Resistor made version
		had a semi-gloss red/brown coating,
		marked only with "MRA".
		These maybe the best version of the Mills
		audio series wirewound.