It wouldn't be a proper Beyer Peacock loco if it didn't have lots of rivets on show. They didn't start out with many exposed pipes, or Belpaire fireboxes, or cab upper sides. The cab is a William Thow signature item, he used them on a number of classes in South Australia before moving to NSW in 1889 (after all the other SAR senior staff refused to work with him). He was popular in NSW but I don't think was a competent locomotive designer, his standard practice was to travel to the UK and sit in the Beyer Peacock drawing office while they designed the locos. The C(79),later Z12, class originally had a spectacle plate and a large roof over the footplate, with no upper sides. The class were a tender version of the Metropolitan Railway A class 4-4-0 tank locos.
JB, it does look good. I assume it is a model of 1210 in preserved condition? It would never have had fully polished pipework while in normal service after being fitted with the Belpaire boiler. 1210 has the kinks in the handrails which the others don't seem to have.