Help With Identifying German Cologne Cathedral Errors PF Etc

Hi all I did not want to hijack other threads with my more mundane examples! I bought a large collection of German stamps that did have a few paged of oddities, PF and errors. My Google Translate for Germany is not capable and the Michel-Spezial copy I have looks like a 10,000 piece puzzle in another language! So a little help would be greatly welcomed. To keep things separate I will do the grouping first and then the specific examples in separate replies so you can reply to the group or to one of the specific examples. As far as comment like "I hope you didn't pay too much" etc these were just extras and part of a larger group. The Descriptions were from the original collection/collector not my guesses.

White mark on nave? window. I have done a close up in black and white as it shows more clearly.

Marks on top of roof. Looks like a mirror of the roof.

This one described as spire retouched, steps roof etc. What variety or description goes with this?

Spot near the 90. This looks a bit like a crescent that extends into the centre of the 0 and between the 0 and the edge.

If you really get serious collecting the Building Series you should know of the collectors' group that specializes in this series (in German, of course):
https://www.bautenserie48.de

@germania Thanks for this link A very interesting site and it must have an English translation as it comes up for me in mainly English also.

Many modern browsers now support translation on-the-fly.
Don

Hi WillUK,

Without specialized book, you wont achieve identification of position charactéristics. Which are primary, secondary, tertiary and so on. You can spend all your time on this serie for the rest of your life.

First step, identification of type, go in Michel volume 2 and ident by type your stamps.

Second step, perforations for each type.

Third step, Watermark

Now you will have the exact stamp identification.

After you will start to think about position characteristics.

Salutations

Hornet

Good advice from hornet785.

Hornet's advice is good. Without a reference showing the actual flaw, a person is merely guessing.

When Michel lists plate flaws, they are listing the ones that expertizers will certify with an identifying marking on the stamp's reverse. Unfortunately, in most cases reference materials are not easily available to identify the plate flaws that Michel lists.

Personally, when I have sent suspected plate flaws to expertizers, sometimes they are confirmed, and sometimes the response is, "Yes, this mark is in the right place, but it is not the plate flaw"…and sometimes a nice photocopy showing the actual plate flaw has been returned with the stamps.

Hi WillUK,

Did you do the exercice to ident type?

Salutations

Hornet