It should be CSS290T-CSS309A.
When TIB405Z-TIB424T were re-registered to
CSS270B-CSS289Z in 1996, most of its CSS routes were converted to
PAC. Remembered tat service 605 got its DAF fleets in late 1996,
followed by 602 and 607. 603 used mainly Hino and Nissan CACs, but
had a DAF cameo before.
Don't forget that in late 1996, CSS haven't renumbered it to
602, 603, 607 yet. btw, I thought I read it from other sources that
PAC conversion was started from CSS 5 than to CSS 7 & CSS
2?