This pair of 2-6-6-0T mallet tank engines were built in 1910-1911 by Werkspoor of Amsterdam in the Netherland. They were numbered 367-376 and 387 in pre 1912 numbering scheme. At 1912 the Staats Spoorwegen started a more orderly numbering system where engines were given numbers according to their classes. The new number for this particular class of 2-6-6-0T's were 551-561. This class of engines were later classified as CC1024 - 34 by the Japanese and passed to DKA (Djawatan Kereta Api, which were later changed to PJKA, PNKA and now PERUMKA).