This is a weird (to me) basic Vixen 80/910 scope. Alt-az mount but overall fit and finish are clearly below the level of the Custom series.
Is this already something manufactured in China, or some earlier offering from some Japanese subcontractor?
then there is this one just below the ebay lisitng you link to 90mm vixen? also German language without translating is hard for me but possibly Klassic Vixen https://www.ebay-kle...968280-242-9595