The description below is taken from the Airfix catalogue this kit was first seen in. There is also extra information underneath the main catalogues description including the changes to the name of this kit in the catalogues.

The 6100 class Prairie Tank Locomotives have proved very successful since their introduction. They run equally well in either direction which renders turntables unnecessary. A superbly detailed 64-part kit complete with transfer markings. - Taken from the 3rd edition catalogue (1964)

13th edition catalogue (1976), recorded as a Series 4 kit.