2671B back to HG 85 after 2.5months MIA from Sv
85 & replaced by 892T.
892T now completely MIA from Sv 85, while 2671B is back on its
original timing before it left.
Likely HG did a last-min change of decision to extend 2671B
& hence they swapped out the older 892T for the newly-extended
2671B~
I saw SBS2671B on 153 several times