My father had two flight computers (because they were USN) dating from the War. One was soley mechanical having a long metal strip graduated in knots that pivoted at the bottom. Similar to the Mk 11A. Unwieldy but chinagraph not required. The other was a fixed rose on top of a box where the slide was replaced by a rolling screen with a handle to wind it up and down. This needed a pencil and I cannot find an example in the above link.
My father passed away and I never did find out where they went.