OS is one of the world's leading companies devoted solely to the manufacture of model steam engines and locomotives.
A Japanese know-how of more than 80 years!
The history of engine production introduced the world's first rotary engine design and more recently the electronic fuel injection system engine ranging from the small displacement .10 engine to the larger 3.0 four-stroke radial engine five cylinder.
For the production of OS Engines, modern precision machinery and carefully selected premium materials are used to ensure consistent performance and long life. BONE. will always pursue "quality and performance" from users all over the world.