Hope everyone had a good time at Oley - it was great to see so many OSKRG-ers there, especially the Brothers Raino and the Brothers Benazzi.
While there, someone asked me about factory documentation of the 1954 KHK. The only thing I have found is the September 1954 Enthusiast (announcing the new 1955 models). The word "again" implies that they were available in 1954. I suspect only a very few, very late in the model year.
Did these have trap doors? If you've got a 1954 KHK, please email or PM me with your trapdoor status, and your serial/belly numbers so we document these dual mysteries.
Dave