3 CTO are known:
RMS-Ceram / 17.5.51.11 / Ahilio
RMS-Ceram / 10.5.51.4- / Malilia
RMS-Ceram / 25.5.51.5- / Roemberoe
The serie is known in seven strips, of five (with gutters between the stamps) and stapled into a booklet. Strips have perforation 14 1/2, and currency rupiah without an "h".
