Nakamichi Dragon CT
(1981 - 1986)

Pretty rare, almost non-existent.
According to one service engineer, the Dragon CT was much more reliable and better sounding than the bigger TX-1000. I wouldn't know but the goal was basically the same - and the same as that used in the original Dragon cassette recorder, only on a larger scale.

Off-center records are a pain and there isn't much one can do if the record is pressed that way! Well, there is something one can do: search for the real center of the record and adjust the turntable platter to budge so that the off-centered record can be read as if it were not off-centered. No small feat on a cassette recorder (for proper head azimuth) but imagine that on a record player !
So, the little arm at the back scans the record groove, decides where the "absolute" center is and the whole turntable assembly then moves accordingly - the cart is no more pushed around left and right and just reads the groove.

UPDATE !
If the TX-1000 was designed by Etsuro Nakamichi (but quite probably built by Micro Seiki), the Dragon CT was "sourced" elsewhere : Nakamichi commissioned Junichi Okumura, then at Fujiya Audio Ltd, to design the CT after the basic goal outlined by Etsuro ! This explains the large differences in approach and engineering between the TX and the CT.
Fujiya was later in the 1980s absorbed by NEC and units such as the Dragon CT were scrapped from the books. And when NEC shut down its own audio/video activities in the mid 1990s, well, the Dragon CT definitively vanished from the landscape.
Thanks to Shinichiro Okumura, son of Junichi, for unveiling this revealing bit of history.