Think for 3791C & 3789P, your inference should be correct so
far according to what I observe too.
6050S has been on Sv 10 for quite awhile IIRC even before the ad
went up. But not sure if any missing bus from Sv 10?
Doubt 3800P is perm Sv 168 though. It's quite unlikely imo for them
to add again to Sv 168 after they just added 3394U to Sv 168 last
month. Might be a long-term cameo.
Alright, will keep a lookout for svc 8's last missing bus. 168's
fleet keeps getting new additions, abit biased right? :/
Svc 10 has 6050 added back, no missing bus as per wiki. Could be
possible timetable change, and one fleet add.