Hello maron, without any marks or any advertisment it is very hard if not impossible to judge this axe concerning it´s time of production. Certain features (eg. the pommel screw) let me think it has been produced in the imperial times or a short time after. But this is pure speculation without any evidence.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.