Circa 20th century working antique iron and wood steam engine piston model for classroom use by a teacher. It features a cut-a-way side to exhibit the piston moving and a small valve at the end which moves up and down. The piston model stands on a 4.00 Inch by 10.75 Inch by 0.5 Inch base. The iron flywheel measures 4.5 Inches diameter and the piston measures 1.5 Inches diameter. Please note of wear consistent with age. There is some removable rust on two connected pieces and also an electrical wire at the end which for unknown use. There are some numbers on various parts of the model but no maker's mark or known place of origin.