From 1977, the CG 362. Check out the ad where it says UHER CR210 The smallest portable hi-fi stereo cassette recorder in the world. Beating the Walkman by several years!
Any metal R2R reels are worth big money over here. UHER had a very small footprint in the USA so I don't know how big they were there but I still imagine they are worth a lot to someone. How did you end up with them?
I have an Akai GX-77 RTR, and had some Maxell tapes on plastic reels. I was then looking for a pair of Aluminium reels to match with the full Silver face of the GX-77 and found the UHER NIBs in Germany over ebay. It was bought 13 years ago. It looked to me very good looking, with a unique design. (I mistook the above ad - just realized that the ad is with 10.5 inch reels, whereas I actually have the 7 inch version of the reels shown in the ad!)