Panasonic, Technics official annual catalogs - 1966-2010
+++ 1972.h,a. SG-100 - world's first & smallest 3 in 1 audio portable device 
++ 1967.p. Concord F-103/National RQ-231 = first japanese radiorecorder with ''compact-cassette'' (TM) 
+ 1972.g. National Panasonic RS-264S
+ 1972.e. National Panasonic RS-260US
+ 1972.f. National Panasonic RQ-212 S
+ 1968.g. Panasonic RF-7270
++ 1969.m. National RQ-210 S