I am so sorry it took me this long to translate this but I was having computer issues. Here is the German to English translation of the standard
@Fosmorefarm posted. It is literal, and may have some errors. Also, anything that is inside brackets [...] is something I added. It may mean some synonyms, or an explanation to what I think it means. When talking about the colors they use the original German names. You can discern which modern color you think it is talking about. I used the word 'sparrow' because that is what the word literally translates to, but our term for those markings are cuckoo.
Here it is:
Niederrheiner, birch color [birchen, picture above] p. 207
Breeding idea - On average, very mobile, wide and medium-high placed hen with full, vigorous, well-rounded shape. Fine-grained, white meat, and white skin. [Especially, particularly, early/precocious] [Not quite sure here - I think it is saying something like: High performance, recognized breed, economical/industrial breed?]. Small breed, tame, calm animal, bad flyers, in all conditions a good fowl.
What is to be demonstrated? - It is important to pay attention to all the points that are useful to a useful value. These are: Spaciousness of the body in the medium-heavy type, movability [agility] by a slighty higher position when the chest and the tail part are raised. Very vital: Full, rounded shape, very wide chest and shoulders gently rising backwards, slightly [hollow?] round backline.
What is to be rejected? - Narrow, too small animals, foot feathering [fletching?] as well as coarse and bony. Plump animals with deep-set eyes and long face. Flat tail, narrow setting, long, straight back. Black coarse feathers and dark skin pigment. White in the ear lobes.
p.208 History - At the end of the twenties of the last century, North-Dutch blue chickens came to Germany, which were not very well received. A few years later, they were taken by the Lower Rhine region breeders J. Jobs and Friedrich Regenstein. They were bred in shape and color so as to create a new breed. While the hens were almost grayish-black in the original animals, and the roosters were brightly colored with silvery drapery [curtains, veiled, hanging feathers? I think it means the saddle feathers], the blue sparrow [hawk] color became dominant in both sexes for German breeders. From the original box shape, the more agile, well-rounded shape has been developed with the aim of creating a breed mainly intended for meat purpose, but also a high yield of eggs. The Dutch animals originated from the Mechelen, Plymouth Rocks, Belgian Camphor [fighters], Faverolles, and other breeds. The new breed was recognized in Germany in 1943. At the end of the forties of the last century, the other colors like the Kennsperber [marked hawk/sparrow], Gelbsperber [yellow hawk/sparrow], birch colored, and blue arose.