Jantar guitar and bass were made at Horovice in the end of 80's. In addition to the name "Jantar" it had some sort of a model number which was D-710S. Jantar bass had a number DB-711. The electronics were based on a previous Onyx (sort of downgraded Diamant) model. As you can see from the pictures, it has one humbucker in a bridge position and a very simple passive circuit.

Jantar guitar and bass were the last "pair" in Jolana history, and since then there were no matching guitar-bass couples with similar body outline.

Credits:

Original (Sunburst) Jantar:
Ivan alias Lordbizarre
"lordbizarre's electric guitar and amp museum"
http://www.lordbizarre.com
Rock! electric guitar and amplifier repair
Leuven, Belgium, Europe.
Yellow Jantar (on the right): Bogaragnes