Note
QST, Nov 1941, p. 97.
Lafayette catalog number 87 (New York), p. 93.
Radio's Master copyright 1942, page H-61.
QST, Aug 1946, p. 105. (TR-4B)
Lafayette catalog number 88 (1947), p. 99.
Radio's Master copyright 1947, page J-9.
Radio News, Jul 1947, p. 28.
A post-war version was released to cover the new two-meter band (TR-4B)(144-148 MHz). See QST, Mar 1946, page 106, though it doesn't say "B" until Aug 1946..
References
Converting to 420 MHz. Radio News, Jan 1950, p. 48.