Tim was a narrow gauge tank engine fitted with side-plates.
The Railway Series
Tim was purchased by the Mid Sodor Railway as a tram engine for passenger duties. He was given the number 7. In one of Awdry's scrapbooks, it is noted that Tim pulled passenger trains to Cas-ny-Hawin.
No information was given about his fate once the railway closed due to bankruptcy. It can be assumed that he was either scrapped or sold.
Tim's model was built by Awdry to be a generic tram locomotive, from a OO9 scale Gem Vari-kit similar to Jim and the Unnamed Dark Red Engine. The Gem Vari-kits are freelance designs.