That came in 1982 for 1 mth?
You can find the picture of that bus in the Singapore Buses Handbook. The bus is now in Australia serving as a School Bus (Rego: 560 DQU). I have a picture of that but I can't post it here because I wasn't the one who took it.
I also happened to see 1 pic of this aircon bus also in the internet.. But can't remember where is it already.
It was actually our 1st aircon bus to arrive SG, but for a short while. If I could remember, there was newspaper write-ups