Related to Consumer electronic, National was very famous brand before it become Panasonic. Even now, panasonic don't have that bless as National was. After National not used anymore as a brand, almost every new product -mostly from china- use National as their brand, for example: National Viva, National Omega, National Panalux, National Airlux, and many others. Everytime product using that name, their sales increase.
This is picture of real national product. It became antique item and have high price :
And here is an example of product that not really National :