112-166 was in SVN, a RAEME W'shop truck, Rob Moseley's W'shop in fact and it was def. Series 2, but after RTA it was rebuilt with another RAEME body, not a GS rear tub. If the GS body was done by 2 Base rebuild, the BBB entry would've been changed.
In the photos of the For Sale veh, we see the firewall may be Series 2 as the steering wheel and shaft is Series 2. But who knows without an inspection.