This is a special edition of the D10 to commemorate the 100th anniversary of the Wilesco company. It has the boiler etched with commemorative text and is supplied in a special plywood box.
The boiler is 108mm long x 45mm diameter, with a standard Wilesco sight glass in one end. It has a safety valve and whistle and no dome or regulator. It is heated by a solid fuel tablet burner. The steam pipe is fed down under the base, with no superheating, to the valve chest of the cylinder.
The cylinder is a double acting "piston" valve type, 16mm stroke x approx 13mm bore. It is reversible using a slip eccentric. The flywheel is 69mm diameter and incorporates a pulley which drives a dummy governor.
The engine is in mint, unfired condition, purchased new.