The 896-907 series cars were the last wood sheathed built by the Katy. Underframes from old Katy boxcars were used in their construction at the Denison Cars Shops in 1942-43. Four groups of these caboose, numbers 821-907 were built beginning on 1937. All were similar with some having fishbelly-type underframes and Andrews trucks replacing the archbar types of earlier cars.

Infomation from the Caboose Corner Series by Jerry Pitts in the March 1987 Katy Flyer and KRHS Publication - M-K-T Descpription of Equipment.