Interesting. The white switch at the top is obviously the band selector. I wonder what the red switch at the bottom does? Attractive set! Looks like it was well cared for.
I didn't find that brand in my book, but, I did find one on the internet. I looks the same as yours, but in a different color. They even show a pic of the insides with the 4.5 volt batteries in place.
http://www.hilberink.nl/toptalix.htm