This Kalkoff was made in Germany back in the early 70s, and sold in Chel tenham,UK. http://webpages.charter.net/steve.johnson1/kal.htm
The stem in it now is a Cinelli, that was made with a 22mm insert. They do exist. I got the stem from a box of stems from a shop that went out o f business.
Steven Johnson, Shiloh, IL
Following my request for a 22mm quill dia. stem for the Carpenter
yesterday Harvey Sachs emailed and asked if I was sure that I was
looking for a 22mm and not a 22.2mm.