Hi all,
the mark shown is not a fake or knock-off but it is very often misidentified based on the fact that Ackermann & Fritze and Ernst Bohne from Rudolstadt-Volkstedt (Thuringia) used similar marks. Both attributions are incorrect, the user of this mark (introduced around 1955) was the short-lived and lesser known decoration business and glass/porcelain shop of Franz Witter from the town of Brühl in North-Rhine Westphalia (which should not be confused with the pressed glass factory of Franz Wittwer from the same town). He is not listed in any common porcelain reference books as his main business was glass and giftware and he was (per definition) not a real manufacturer even though he sold large numbers of porcelain and porcelain lace figures.
The info available on a few paysites states exactly that, so there is no need to join them - I bet you can guess who they nicked that info from in the first place.