if you have access to needlebar here is a cool history of the company.
http://www.needlebar.org/bb2/viewtop...1&p=4267#p4267
I have a Hengstenberg/Anker Westfalia with the Wittler type mechanism like this.
[ATTACH=CONFIG]423434[/ATTACH]
[ATTACH=CONFIG]423435[/ATTACH]
I am also looking for a manual. I almost bought another one last month BECAUSE it had the manual... I wrote the seller and offered to pay for a copy, but i never got a response.
FYI even though the outside looks clean, here is what it looked like inside the head...
Before cleaning
[ATTACH=CONFIG]423438[/ATTACH]
After cleaning
[ATTACH=CONFIG]423439[/ATTACH]