Hohner The Prinz dating

Hi !!

Don’t know if I’m at a the right place. Here is my request :

I just found a beautifull Hohner the Prinz. But I don’t found any info about it.

I’m surprised about one thing on my guitar. The serial number is not on the back of it at the junction of the body and the neck (see the pictures).

Can you help me to know more about my new friend ? :blush:

Thanks a lot.