They were introduced in 1941 and lent-leased to the United Kingdom for use in the Middle East during World War II.

At least 85 S200s operated in the Middle East, including Egypt, Palestine and Lebanon.

[3] 29 of this batch was later supplied to Turkey where they became the TCDD 46201 Class.

51 S200s built in 1942 served on the Trans-Iranian Railway, where they became Iranian class 42.

[citation needed] Two of the Turkish locomotives survive: 46224 at Ankara and 46244 at the Çamlık Railway Museum.