These units were converted from Z3i 441-449 postal cars in 1932.
Technical specifications:
- Year of construction: 1932
- Length over buffers: 13050 mm
- Wheelbase: 8500 mm
- Tare weight: 20.0 t
- Max. speed: 100 km/h
1941
In 1941, all units are converted in parcel postal cars Zp 720-728.
1968
All units were discarded starting from 1968 until the early 1970s.