601S, 602P, 623D, 625Z, 651Y seems perm on 19 already to replace
most on the NAC Scanias. Not confirmed. They have been on 19 for 1
or 2 months already.
601S or 602P(can't remember) got 19 guide stick on glass behind the
BC. Sure to be perm.
594D, 599R, 603L were brought in to replace 3579P, 3592P &
3635A when 38 was converted to fully A/C svc.
