York-Bolton steam plant by Historic Steam Models, widely regarded as one of the finest stationary engine kits available. Extremely well-detailed, it looks nice as a display piece but is also a well though-out working model with a piezo-ignited gas-fired boiler with pilot burner coupled to the horizontal engine driving a dynamo, complete with engine room lamp. Beautifully made, this plant was assembled and has been test steamed only - it appears brand new throughout.
The model is still in Historic Steam Models current range.