Aurora Maid TR-1, c. 1956
Thunderbolt. TR-1 "MERZON LEATHER N. Y." on bottom, "Jewel TR-4" on PCB.
Apparently the same as "Jewel All Transistor Vanguard TR-1" and Jewel "Tunderbold" TR-1.
PCB looks different than "Cosmopolitan Vanguard TR-1"
which looks othewise identical. "TR-1" appears on the bottom of all versions
found. Looks exactly the same as the Ambassador Vanguard.
Made in U. S. A., Battery Eveready 246, 9V.