I suspect that this is the same one that was on ebay a while back. I was watching it too, mainly because I was very intrigued by the 'Germany' mark.
The design of the glass itself is seemingly an exact match for Sabino's 7023 Vase "Rosaces" (see Decelle (1987) Sabino Maitre Verrier de l'Art Deco 1878-1961
I think there are several possibilities here - perhaps the design was copied, or maybe Sabino added the mark at the request of a retailer or to help sales in Germany (Both Walther & Inwald patterns have been recorded with mysterious 'Belge/ Belgique' marks so this practie of adding misleading country of origin marks is maybe not without precedent). The other possibility is that a mould was sold off or maybe appropriated during the war - without any further evidence it's impossible to say.
Anyway, it's a fantastic mystery piece. Would it be possible for you to add a photo of the mark please?
Edited to add: Is the mark on the body of the vase/ lamp body itself (pink, mould-blown part), or on the attached base? If the Germany mark is only on the black base, then I think it's likely that this is a Sabino piece but was just converted to a lamp in Germany or using German parts at some point.