SEK Class Δα

SEK Class Δα (or Class Da; Delta-alpha) was a class of twenty 0-6-0T steam locomotives of the Hellenic State Railways in Greece. These were ex-United States Army Transportation Corps (USATC) S100 Class. They were delivered to SEK in 1946-1947 and were numbered Δα51-70. Two of these locomotives still survive and are undergoing restoration at the Railway Museum of Thessaloniki.