The book I have, A Century + Ten of D&RGW NArrow Gauge Freight Cars, 1871 to 1981 by Robert E. Sloan has the same info as drgwcarman. I am going to add the following: The cars delivered in 1904 had a board roof, but were rebuilt in 1926 with metal carlines and sheet metal Murphy roofs. This might be important depending if you are modeling these cars and which time period you are modeling. Let me know if you need anymore info and I can look it up in the book. BTW, this book is inexpensive really good! It has drawings dimensions, and photos of all the DRGW freight cars.