I think that these three are about 1:150 scale.
Most of the railway Micromodels were around 1:200 but they were designed to fit the space available on the cards and so the smallest subjects tend to be to a larger scale.
This also has a bearing on whether two or three locos were included in a set, and how much card space was left for diagrams and instructions. It has certainly been a bit of a headache for me to fit enough information onto my own model designs!
Robin Madge
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