The "Roadster" that appeared in 2001 is said to be based on the "Torchu" that was created in 1912 and was inspired by the tortoise shell. It's a discontinued model, but it had a nice feature that users couldn't find anywhere else. It came with a replacement belt at the time of purchase, and had a function that allows you to replace it yourself with a single touch. You can choose your mood and style and change the belt immediately, so you can enjoy using it in every scene.