It's the Doctor Yellow. It's in working order. I've made it a 10-car formation. *If you run it as is, it will derail on curves, so when you actually play with it, please reduce the number of intermediate cars slightly. *I've tried to arrange the formation to match the set when it was new as much as possible, but not all combinations are correct. Please look at the images carefully and check, and if you don't understand, please ask. I will answer to the best of my ability. If possible, please research it yourself. This was played with by a child, so some cars are clean, but others have dirt and scratches. It is not suitable for collectors. Please look at the images carefully and check. If you are concerned, I think it's better not to buy it. Items that are broken and unusable, or that have problems playing with them, are not included. I have lightly checked the operation. 【Promises ※See self-introduction for details】 ★I do not do exclusive sales or hold items★ ★Please state your desired price when negotiating a price reduction★ ★I comply with Mercari's rules and regulations★ I have no personal rules. ★Please research the product specifications yourself★ ★I often put out similar items over time★ It might be convenient to follow me so you don't miss anything. ★I irregularly participate in flea markets★ I will temporarily suspend listings during flea markets.