North German Wax Stamp? 1871 D.u.b.berlin Cxl Help Please

Hello, This stamp has been a tough one for me to figure out. Although this stamp is very light and appears to be faded I don't think it is due to the cancel and surcharge? not being faded. I think the stamp reads Norddeutches Wachsstemple or North German Wax stamp? I saw one very similar to it with the same light color printed on paper similar to goldbeater paper. The cancel on this stamp is D.U.B. Berlin 1871. Can anyone tell from thos image if this is a North German Confederation stamp? Also, does wax stamp make sense and finaly what does the D.U.B. stand for?
Thanks
David

In the frame it says NORDDEUTSCHER WECHSELSTEMPEL (nothing to do with wax).
It is listed as the last entry on this link (but no picture). Don't know anything about the cancellation.

http://catalogue.klaseboer.com/vol1...gstatnor.htm

As 22crows said, it's a Fiscal Stamp (Wechelstempel) of the North German Confederation (Norddeutsches).

I'm not familiar with that cancel. Considering how Wechelstempel were used, probably a particular company, which would make it difficult to track down.

That's great. Even with my jewelers loupe I had a hard time reading that. Thank you both very much.

Someone, somewhere, has one still attached to a piece that would identify D.U.B., but absent that, it would be a tough slog finding the answer with Google. (I tried a couple different searches and gave up.)

It could represent an abbreviation of a three-word name, or the "U" could (perhaps?) represent und ("and" in German, e.g. D&B).

Thanks cjd, I'll keep pluggind away at it and may eventualy get lucky.
David