Panasonic, Technics official annual catalogs - 1966-2010
+++ 1972.h,a. SG-100 - world's first & smallest 3 in 1 audio portable device 
++ 1972.h,c. National SG-100 = world's first & smallest portable 3 in 1 system
++ 1967.k. Concord F-103/National RQ-231 = first japanese radiorecorder with ''compact-cassette'' (TM) 
++ 1967-8.p. Concord F-100 = National RQ-3001 made for USA 
++ 1967.o. National RQ-3001 
+ 1977.g. National Panasonic R-5410B
+ 1972.e. National Panasonic RS-260US
+ 1972.f. National Panasonic RQ-212 S
+ 1968.b. National RQ-203
++ 1969.m. National RQ-210 S