Hm... Still puzzled Nice marble though. Banded translucent with a looping pattern? Can't tell from the pics what the pontil looks like, is it faceted? I'll go out on a limb here, others might disagree with me and that's fine, but I can't help but wonder if these were made somewhere other than the average marble huts in Germany. Reason I say that is the style/size/colors don't really match up with other marbles from that era. If it was the 'first off cane' that could explain the style/size (being large and the looping pattern) but you'd expect to see at least a hint of the other traits in a more conventional German cane cut marble.
I'd lean more towards an 'art glass' type of marble but that's just my opinion. It certainly doesn't take away from the eye appeal. I think Lloyd (?) might have had a couple that came with some older larger Germans so who knows