Created in 1974, D250190 was introduced as the National Panasonic RF-5410BA in 1976.
Introduced as the National Panasonic RF-5410LBS in 1977, D244102 was created in 1976.
Created in 1982, D278144 was introduced as the National RX-C60F in 1984.
Created in 1980, D266664 was introduced as the National RX-7200 in 1982.
Created in 1978, D259785 was introduced in 1982 as the National Panasonic RS-4360 DFT and Panasonic RX-7700.