Thank you all for your fantastic response.
Some of you are right. Yes, it based on a Masterball. This is the second explanation for the name I gave this puzzle, too.
I printed only the extensions.
cw_master Olidjus (8).jpg [ 78.61 KiB | Viewed 923 times ]
cw_master Olidjus (9).jpg [ 75.82 KiB | Viewed 923 times ]
Andreas, I am sure the Olidjus has only 6 moveable pieces on top and bottom. But I will check it this evening.