The prr.railfan.net X29 page describes the X29B as follows:
- 4500 X29's rebuilt 1940-1950
- New body on old underframe
- Corrigated Roof & ends
- 10'6" interior height
- 3478 cu ft capacity
The photos and drawing of the X29B show R+3/4 improved dreadnought ends and Stanray diagonal panel roofs. Those components were available in the late 1940s and 1950s . They were not available in 1940. Either prr.railfan.net has the start date of the X29B rebuild program incorrect or some type of roof and end other than those shown in the photos was used on the early X29Bs. Does anyone know when or with what type of components the X29B rebuild program began?