There's quite a few of these style basses knocking around. They're a combination of fretless and fretted. Because.......... Why take two bottles into the shower.
I believe they're switchable between the fretless only section, the fretted only section, or both section at once.
They actually make a lot of sense if you play a set with a lot of swapping around between fretted and fretless, but they do look utterly ridiculous!