Errr, just check all my records from 1990 to 1996, TIB 281 to
TIB 300 was one type, and TIB 301 to TIB 310 were another type. So
if there are 20 regos that are R87, Should be TIB 281 to TIB 300.
Of course, I could be wrong, so anyone has concrete information,
please share it here.
Ermmm, again, in 1996, that bus was converted to NAC when it was
with TIBS. I checked with TIBS then. Maybe they change it back to
AC when transferred to SSB???
From my email correspondance with a PR lady in TIBS way back to
1996 / 1997, she confirmed that TIBS had transferred 45 buses over
to SSB. TIB 380 to TIB 390 was 11, and TIB 391 to TIB 424 was 34.
Whether SSB used the buses or not, or they decided to sell it,
that's another story. But the original plan was all 45 buses were
transferred.
Thanks for the info, and it should be converted in early 1995,
not 1994. 1994 Nov, TIBS only have TIB 425 to TIB 441, serving on
851, not enough AC buses to go round.
And yeah, why don't we shift talk of the old regos ranges to the
Nostalgia Thread, Sorry to threadstarter for going off Topic big
time here. 
