Heavyweight! The rubber bulldog from 1921 is a tractor that can pull a minimum load of 6 to 7 tons and covers a speed of 5 to 6 km per hour. From today's point of view, this is not exactly exhilarating, but it was a great novelty for the time. The rubber bulldog replaced two teams in continuous operation and was therefore much cheaper in its running costs. The advantages of the Bulldog such as: simplicity of construction, simplicity of operation, constant readiness for operation and great operational reliability were used as sales arguments - arguments that corresponded to reality. The Bulldog could not only be used for driving but also as a driving force for machines in industry, trade and agriculture. It was mainly used in sawmills, timber shops, brickworks, coal shops, freight forwarders, breweries, construction companies and much more. The fuel consumption was 11/2 - 2 kg per hour, depending on the quality of the fuel, lubricating oil consumption was approx. 100 g per hour, operational readiness within 2 - 3 minutes under full load. The super filigree model of the Bulldog impresses with its many small details and is a true work of art that should not be missing on any showpiece.