SEK (Sidirodromoi Ellinikou Kratous, Hellenic State Railways) Class Θγ (or Class Thg; Theta-gamma) was a class of 2-8-0 steam locomotives ex-United States Army Transportation CorpsS160 type. 27 locomotives were acquired in 1947; Θγ521–537 were coal burners, while Θγ551–560 were oil burners. In 1959, Italian Railways (Ferrovie dello Stato, FS) sold another 25, formerly Class 736, Nos 736.011/23/40/55/73/90/101/2/126/7/131/5/51/8/60/4/6/78/88/90/9/203/7/9/17 to SEK. These were renumbered Θγ571-95 in the same order.
A few still survive in scrapyard condition. Four are at Thessaloniki Old Depot (Θγ 525, 532, 535, 584), one is outside Thessaloniki current depot (Θγ 593) whilst one more survives at Tithorea depot (Θγ 576).[1] Θγ 575 is under overhaul at the Churnet Valley Railway in Great Britain. [2]
