" This Engine is a #173, built in 1919 by Wilhelm Bischoff, while his factory was still in Dresden, Germany. His engines are robust and brilliantly machined. This particular Engines Dimensions are 13"" x 10 1/4 x 9"" and weighs 30 Lbs. The flywheel is 7"" in diameter. Bore 1.75"" x Stroke 2.0"". "