Raymond Weil Caliber RW4250

The Raymond Weil caliber RW4250 is an automatic movement with a small seconds complication at 6:00.

This caliber is found in various RW models, including the Masetro Tradition introduced in 2010 (press-release), as well as the Maestro Small Seconds released in 2022 (press-release).

RW 4250 VS RW 4200:

The RW4250 is sometimes confused with the RW4200 – the main difference being that the RW4200 has a central seconds hand and the RW4250 has a small seconds subdial.

RW 4250 VS RW 4251:

As of this post, the current Raymond Weil models with small seconds (Millesime Collection) are powered by a caliber RW 2451 (RW4251). The main difference appears to be that the RW4251 is a no-date.

Base Caliber:

The base movement of the RW4250 appears to be a Sellita with a custom rotor.

You may see some reviewers reference the Sellita caliber SW261-1 as the base for the RW4250, but Caliber Corner thinks it is closer to the SW260-1. They are very similar movements, but the small seconds hand pinion is either higher or lower on the dial depending on the version.

The difference between the SW260-1 and SW261-1 is less than a millimeter of distance between the position of the small seconds hand. The image above may be an optical illusion caused by case and dial size (it’s based on a computer render after all). Therefore, this is unconfirmed and just a best guess based on visuals. It would not be surprising if it is in fact the SW261-1 since that movement seems to be more widely used than the SW260-1.

Of course, it doesn’t help when a watch brand is not transparent about their movement specs and the base movement used. If you have a watch with the RW4250, please check under the balance wheel and post an image if possible.

Additional Resources:

• More Raymond Weil watch movements
• Raymond Weil instruction manual (pdf)