zhoenixx, if you have looked up all the information given you above, you would be able to note "dates made/manufactured" for the pottery marks.
Ipcress, the first batch of pics has a mark for Bawo & Dotter which dates it 1896 - 1900.
As for the rest, agree they date to 1900's. The pitcher's mark was used 1898 to 1923; the style resembles the early 1900's even tho it can't be specifically pinpointed by mark.