SBS Longest bus in Asia, Volvo B10M MKIV Articulated Bus, rego
SBS988Y.

Took it only once on ex-290. At that point of time 290 also have
SBS999U in their fleet. When 290 was withdrawn, both
articulated buses were allocated to 18 before sold to NZ/ Aust.
Pic extracted from internet.
Cheers.
i saw it almost everytime last time but never got a chance
to board it...