CZ LOKO has completed two EffiShunter 1600 locomotives for BTS - Bulk Transshipment Slovakia. Upon completion, both locos were equipped with standard gauge (1435 mm) bogies and numbered 774 723-1 and 774 724-9 respectively. After delivery to Slovakia, the locos got their broad gauge (1520 mm) bogies and were renumbered into 774 823-9 and 824-7.