Star Blue Glass Type 201A
	During the mid to late 1920's there were hundreds of companies making the 201A type of tube, but only a handful making them with colored glass, the best known being Arcturus.  There is no name on this tube, but there was a Star Radio Laboratories operating in New York that may be the manufacturer.   The blue "Star" had a much deeper cobalt blue color than the others, and is a particularly beautiful tube.  It has a short-pin Bakelite "UV" base, which puts it into the 1924-25 period.
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