Note: Model number decode: 8 G 0 05 TZ1
			   a | |  |  |    8 tubes
			     b |  |  |    AC/DC/Battery
			       c  |  |    1946 (introduced)
				  d  |    TransOceanic
				     e    TZ1 revision
    a) First one or two numerical digits indicated the
        number of tubes (sometimes inflated by one)
    b) Followed by one or two letters as below	
	A - all wave ac
	B - 6v battery
	D - 110v ac/dc
	F - 2v battery
	G - portable ac/dc/battery
	H - FM
	J - 6v battery/110 ac
	K - a/b battery
	L - long wave (below 550 kc)
	M - automotive, second letter indicates make
		D - Dodge
		F - Ford
		H - Hudson
		L - Lincoln
		M - Mercury
		N - Nash
		W - Willys
	P - Police
	R - Radio-phonograph
	S - Shortwave (to 18 mc)
	T - 100v ac only
	U - Extended frequency short wave (above 18 mc)
	V - 6v vibrator
	X - 32 volt

    c) 1936 - Followed by two digit model number
       1937-1949  Followed by single year digit 
	1 - 1937
	2 - 1938
	3 - 1939
	4 - 1940
	5 - 1941
	6 - 1942
       (no civilian radio production Apr 1942-1946)
	0 - 1946
	7 - 1947
	8 - 1948
	9 - 1949
    d) Followed by two digit model number
	Note: indicates model year was introduced
	      if no major change, may have stayed same for years
	- 1936-1942: repeated for different tube numbers
                     but same model had same last two in
                     different years.
        - 1946-1942: unique model numbers
    e) Followed by one or more letter/numbers for revisions/
	veneer/covering materials.

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