one of a kind late 19th or early 20th century diminutive salesman "sample" or demonstration model of commercial grade self-contained brickset water-tube boiler. the exact fabricator is not known. the remarkably detailed and largely intact scale model was purportedly used with a traveling salesman representing the pennsylvania boiler works, erie, pa. the hand-painted vertical fire or water-tube boiler is enclosed in riveted joint wrought iron panels with lightly incised segmented lines emulating brick and mortar walls. the front wall contains a double strap hinge fire door with an intricate latch and catch. the concealed cylindrical-shaped multi-tube fire tube with cross water-tubes is comprised of soldered joint copper with nicely aged patina. there are a multitude of valve fittings comprised of brass or bronze with a nickel-plated finish. the circular-shaped steel boiler inspection door with multiple valves and handles is fastened to an outer frame with equally-spaced rivet heads. the red and white paint finish remains amazingly intact with surface crazing and minor flaking consistent with age and frequent handling. the boiler unit was originally mounted to a wood bed frame. no manufacturer markings evident on any and all of the interior and/or exterior components.