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type: BM Volvo ST 257
country of origin: Sweden
manufacturer: Bolinder Munktell, Eskilstuna
engine: A4.99, four-cylinder, 1620 cm3
grain tank capacity: 1.46 m3
thresher drum diameter: 55 cm
operating speed: 20.8 km/h
fuel: diesel
dimensions: 6040x2630x2640 mm
weight: 2140 kg
years of production: 1961-1969

The combine was made by a Swedish company Bolinder Munktell Ltd, Eskilstuna that was established in 1832. In 1950 the Bolinder-Munktell production passed to Volvo. The exhibit was a popular model in the 1960s. The machine did not feature a driver's cab, it had a five-arm reel, a drum threshing system, and three-part shakers. The combine was originally manufactured under the name Thermaenius 257 (in 1961-1966], later it was renamed BM 257 (in 1967-1969).