Hadn't seen this topic until I was pointed in this direction!
The "Rocket of China" 2-4-0/0-6-0 loco does actually have a (very) vague similarity with the 2' 6" gauge 0-6-0T's supplied by Ransomes and Rapier of Ipswich to China in 1875 for the first railway line there (Shanghai & Woosung Tramroad). Perhaps someone saw a photo of one of those and came up with this loco!
Now if they did a decent model of one of those, that would be interesting.............