Help With German Stamps Perfins.

Is there a catalouge on the internet for this

Recommend you start by googling the SCF message archive.

A catalogue was published by the "Perfin Group" of the German Study Circle.

Lastly, posting your findings on SCF will potentially aid fellow collectors/readers.

There's no online catalog, but the print catalog (or in PDF format) is published by "Arge-Lochungen" and this is the link ->
http://arge-lochungen.de/katalog/

For the English version just click on the union jack at the right top.

I'll check the ones you found in a moment ...

Here we go ...

DV (1-DV-2)
-> Deutscher Nahrungsmittelhandelsverband (Berlin)
OR
-> Deutsche Vereinigte Schuhmaschinen-Gesellschaft (Frankfurt)

But due to the stamp issue date (upcoming inflation in 1923) it should be the second (perfin usage period 1922-1928)

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Dr.B. (1-DRB-15)

-> Dresdner Bank (Berlin) … 11 types/different cancel s of Berlin known, maybe a cancel specialist can tell you more.

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ATG (1-ATG-1)

-> Allgemeine Transportgesellschaft (Hagen)

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BB/V (1-BBV-3)

-> Barmer Bank-Verein … 9 different cancel cities known, can't tell which one it is here

Tommtomm, thank you very much