Dapol 2S-007-030 Pannier Tank 3621 GWR Shirtbutton - N Gauge Dapol 2S-007-030 Pannier Tank 3621 GWR Shirtbutton DCC READY (NOT FITTED) N Gauge The Great Western Pannier tank locomotive is a type of 0-6-0 steam locomotive which carried water tanks on the side of the boiler in the manner of panniers, this allowed the water to heat up quicker and thus give a greater performance.
