1948

Units Z4i 937-940 were built between 1947-1948.
Units Z4i 941-950 were built between 1954-1955.

Technical specifications for units Z4i 937-950:
- Length over buffers: 21200 mm
- Wheelbase: 16970 mm
- Tare weight: 31.0 t
- Max. speed: 140 km/h
 

1958

Units Z4i 551-600 were built between 1958-1965.

Technical specifications for units Z4i 551-600:
- Length over buffers: 20700 mm
- Wheelbase: 16970 mm
- Tare weight: 31.0 t
- Max. speed: 140 km/h
 

1964

All units receive new registration Zi 551-600 and 937-950.  

1969

Units Zi 937-940 receive new registration Z 807-810.
Units Zi 941-950 receive new registration Z 861-870.
Units Zi 551-600 receive new registration Z 811-860.
 

1981

Units Z 807-810 receive new registration 887-890.  

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Latest update on the 23rd of November 2019 at 23:12

Contributor(s): Tudor C.

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