3112 is a preserved former New South Wales Government Railways C30 class steam locomotive built in 1914 by Beyer, Peacock & Company, England.

[4] Following the purchase, it was moved by road and rail to the Lachlan Valley Railway's Cowra Locomotive Depot on 21 December 1986.

3112 was supposed to have left Goulburn, bound for Melbourne early on 14 October 1988, but failed with a hot axlebox that prevented it from departing on time.

Between 1988 and 2007, 3112 saw most of its work with 3801 Limited, attending the annual Hunter Valley Steamfest at Maitland and Thirlmere's Festival of Steam, as well as running enthusiast specials to Kiama, Gosford, Moss Vale and other locations in the Sydney area, during which it was sometimes paired with 3801 and 3830.

During this time the locomotive was based at the Eveleigh Railway Workshops, home to 3801 Limited, where Barry, Ian and a small band of volunteers attended to running maintenance and statutory examinations.

In May 2007, 3112 was sold by Barry Tulloch to Boyd Munro, who decided to move the locomotive to Canberra to be kept with the rest of his collection in July 2007.

Its most recent was when it appeared briefly in one episode of Series 5 of The Block, during which it almost ran the couples over since their 'magic doors' placed them right on the entrance to Sydney Central station.