They were ex-NKP cabooses rebuilt from boxcars during the Depression and World War II. They retained their original boxcar ends. Marty Flick ---- NW Mailing List via NW-Mailing-List <nw-mailing-list at nwhs.org> wrote: > I ran across the C13--a caboose with dreadnaught ends. What can anybody tell me about them and their evolution?Michael Shockley