Thanks for all of this great information. Londonbus (Hamburgbus??) your collection is quite amazing.

I assume by the "faux" stamp that some of these (or perhaps many) are not originals.
When I read what you had written, I did a google search on "post-couvert" which is part of the black writing across the stamp (see Londonbus' 7 Schilling). It turned up a number of envelopes from old German states, including this one from Hamburg

This confirms what you have been saying.
I also came across this site
http://www.philaseiten.de/cgi-bin/i...CP=27&F=1#M2which, when translated into English from German through Google Translator, reads as follows. The person asked for information on one of these stamps, posting a picture of a 1/2 schilling black and white cut out, similar to the second last one on the top row of Londonbus' first picture.
This is an excerpt from a Hamburg postal envelope. It is the basis of the fragment is not possible to determine from which GSU (Michel) number, he was ausgeschnipselt value destroyers. It depends on the shape of the back door and the letter of the type of Klappenpraegestempels. All these features are not available.
The cheapest varieties of unused hamburger GSU a 1/2 schilling worth only EUR 3.50 (Michel GS-Catalogue 2003). Used they are much more expensive. Wertmaessig must be a discussion of the excerpt that is not necessarily pluck all the hair. Still a shame. A case for the trash can. The gray diagonal excess pressure above the value stamp was on the other "A half-shilling postal envelope."While this person obviously doesn't value the cut out highly, his sentence, "
It depends on the shape of the back door and the letter of the type of Klappenpraegestempels" I found to be interesting, if only I could work out what it means???

It is also interesting to note that in the black overprint "Schilling" is spelt with and without an "e" on the end.