Indonesia has always issued beautiful stamps and here we have a cover with a nice, round S/S celebrating the Year of the Rat. The design of the S/S is unmistakenly awesome and the intertwined black and white depictions of rats in a round shape suggest a yin-and-yang symbol, very in line with the Chinese theme; a very clever design! I couldn't find out more about the issue since the English version of the Pos Indonesia has yet to be completed.
This S/S was postmarked at Bogor, a city in West Java that was the capital during British occupation under Stamford Raffles. The date is, unfortunately, unintelligible.