Dobis Images
Vacuum Tupe-3-2
This vacuum tube is designed for experimental use back in the early 1900. It is covered by three patents, 803,684 841,387 and 879,532. This tube is manufactured and was sold by Atlantic = Pacific RADIO S Supplies Co., 646-648 Mission Street, San Francisco, California. Looking at the patent, this design tube has platinum wire in it. The platinum wire maybe worth more than the antique value of the tube, but I leave this up to the buyer to decide. It also comes with the original box. The box shows the type as E.R.. I am guessing this means Experimental, Radio.
Vacuum Tupe-3-2
This vacuum tube is designed for experimental use back in the early 1900. It is covered by three patents, 803,684 841,387 and 879,532. This tube is manufactured and was sold by Atlantic = Pacific RADIO S Supplies Co., 646-648 Mission Street, San Francisco, California. Looking at the patent, this design tube has platinum wire in it. The platinum wire maybe worth more than the antique value of the tube, but I leave this up to the buyer to decide. It also comes with the original box. The box shows the type as E.R.. I am guessing this means Experimental, Radio.