This is a kit for a 40hp Armoured Simplex in 5.5mm scale, made from white metal.
This comes complete with a dummy chassis to produce a static model, though a suitable motor bogie to power it may be found.

Can be built and finished to order, email to enquire.

1/55 scale is half way between 009 and 0 16.5 scales, and runs on 12mm, or 'TT' track - available RTR.
Check out the 5.5mm association for more information on the scale at http://www.55ng.co.uk/, or join the facebook page, just search '5.5mm railway modellers'.