1950

All units are built between 1950-1951.

Technical specifications:
- Year of construction: 1950-51
- Length over buffers: 15500 mm
- Wheelbase: 12500 mm
- Tare weight: 19.0 t
- Max. speed: 125 km/h
 

1958

Unit Z4i 830 is discarded after being involved in an accident in 1958 in Lalden.  

1964

All units receive new registration Zi 821-830.  

1967

All units are converted to Zp 692-700.  

1969

All units receive new registration Z 401-409.  

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Latest update on the 23rd of November 2019 at 23:34

Contributor(s): Tudor C.

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