Staff and Dormitory Coach
Built VEB Waggonbau Bautzen 1969-70 as type ABa (048-3, 060-8)
Built VEB Waggonbau Bautzen 1970 as type Aa, later Am (052-5)
Built Vagónka Tatra Studénka 1969 as type Aam. Reclassified Bam in 1978 and Bmn in 1983. Converted to current configuration in 1989 (112-7, 149-9)
Built Vagónka Studenka 1972 as type Bai (254-7)