Physical description
Product of locomotive firebox company - glossy printed brochure Circ 1931. Title 'Syphon Safety from boiler explosions caused by low water' advert for the Thermatic Syphon.
Product of locomotive firebox company - glossy printed brochure Circ 1931. Title 'Syphon Safety from boiler explosions caused by low water' advert for the Thermatic Syphon.