VW Beetles 1958-1967 Akkord pull out picnic radio

Akkord pull out picnic radio with VW Bug 58 – 67 dashboard mounting unit in used condition. Tested and not working. I put 12V on the dash mounting unit and the radio display lights up but no radio sound. On the rear of the radio is the batterie cover missing. The radio has the original antenna. The dashboard mounting unit comes with good chrome face plate. It looks like that the face plate mounting brackets are missing (see link and compare https://www.classiccult.com/akkord-picnic-radio.html). Made in Germany.