This is one of the Weeden type commonly known as the table frame. The frame is a single iron casting supporting all components of the engine, with 6 table-like legs.
The Boiler is rolled from brass sheet, with a longitudinal join along the bottom and with 4 rows of imitation "rivets" and the maker's name embossed thereon. It is 2 5/16" diameter x 6 1/4" long with a safety valve, whistle, steam dome and glass tube type water gauge. It is fired by a three wick meths burner. The dome has a screw throttle built in.
The cylinder is cast in lead, complete with valve housing and a dummy crosshead trunk guide (there is no cross head). The valve is a round slide valve, controlled by a slip eccentric on the crankshaft for reversing.
The cylinder is approximately 7/16" bore diameter x 15/16" stroke. The spoked flywheel is 3 3/16" diameter steel. There is an 11/16" pulley next to the crank, which drives a dummy governor mounted on the cylinder. This is a new replacement for the one that was missing.
The paintwork is not original and is incorrect in places. It is badly scorched so it could do with being redone using high temperature paint.