The EZ-Link ad on
555Z (WL 61)
The Supreme Master ad
on 651D (WL 167)
The body shop ad on
974Y (AM 67)
Pastamania ad on
2703T,8331T (HG 161, SL 240)
The back ad on 663U
(WL 167)
The Sony cyber-shot
ad on 587G (WL 966)
The ad on 1077E (AM
969/980)
1077E's ad and 587G's ad are expired. But 1077E has been keeping
the ad since 2008! And 587G's ad is going to disappear soon.
As for other SMRT buses like you mentioned about 376Z and 368Y,
probably they will only remove the ad when the buses are sent to
the scrapyard.