Body and controls layout lead to the Clover Apeiron... Pickup / PU position and especially PG shape are confusing...
Probably a very early model or custom made...
Try to reach Jörg Neugebauer - he used to be the owner of Clover, and he aldo worked there before he owned the company... he should know for sure... however, he is sometimes hard to contact, and, as he sold Clover last year, I am not sire wether he still works for them... Good luck!