My point is that the buses that was de-registered right before
its lifespan ends.
The answer is SBS7247K.
It was laid-up (revealed on 15 Oct 2011) then revealed to be
de-registered on 30 Oct 2011 when SBS7244T to SBS7246M got their
lifespans extended.
your question is not clear at all. 7204/7297 also
can be the answer