Originally supplied in 1898, this locomotive was built by Hunslet to 18" gauge and spent its entire working life of sixty years at the John Knowles & Company Clay Processing Works, near Woodville in Leicestershire.
Now in preservation, Jack is to be found in restored condition at the Leeds Industrial Museum, Armley Mills in Yorkshire.
The 5 Inch and 7 1/4 Inch Jack is available as an unpainted kit, painted kit or ready to run model.