It's my Polish smallest pocket stereo FM radio of 80's "Unitra RS-101". I have bought it in 1987. It has much imprints and wipes of using (e.g. red stickers instead of the belt clip). Many inscriptions have been wiped off (e.g. "volume", "headphones", etc).
It originally had the old eastern FM-OIRT band 65-74 MHz. I have altered it to current FM-CCIR standard 88-108 MHz.

Certainly is a unusual brand of portable radio. Never heard of this mfg. before. Always good to see someone who was original buyer still have the unit.