Well-advanced model of a Great Western 850 class, the original engines were designed by Dean & Armstrong and introduced in the 1880s with saddle tanks. Following rebuild at Swindon they were fitted with pannier tanks, though retaining the open cabs - the last picture shows a 5 inch gauge version which I sold earlier in the year.
Well-made chassis, complete and running on air. Inside cylinders with Stephenson's valve gear, pole reverser in cab, mechanical lubricator behind front buffer beam. Screwdown hand brake.
Copper superheated boiler with most fittings to complete. The bag of parts includes regulator assembly and handle, firehole door, inner dome, boiler clacks, blast nozzle and blower ring.