This is a model train made by my father, who loved trains and was very skilled. I don't know much about model trains, so please feel free to ask any questions you may have. The gauge is probably N gauge. Those who are familiar with it will probably know immediately from the size. If I am mistaken, I would appreciate it if you could point it out. A few years ago, I had a friend of my mother, who also loves model trains, check if it still works, and it did, but I haven't confirmed its current condition. The material is metal, and there is some paint peeling and dust. Please check the photos. The model itself is very precisely made, and my mother says that my father was very enthusiastic about making it when he was young. I don't know if it was just assembled from a pre-made kit, or how much of it was handmade. However, the model itself is very detailed. I don't know what kind of product it was originally sold as, but I think it was probably made about 40 years ago. I am looking forward to hearing from those who understand its value and those who love these kinds of models. Thank you for your understanding. Type...Steam