Raymond Weil Caliber RW4250

Brand	Raymond Weil
Caliber Number	RW4250, RW 4250
In-House?	No
Base Caliber	Sellita SW260-1 or SW261-1 (see below)
Movement Type	Automatic, self-winding mechanical
Lignes	11.5”’
Diameter	25.6mm
Height	4.6mm or 5.6mm (see below)
Jewel Count	31
Beat Rate	28,800 vph, 4 Hz
Lift Angle	50 degrees
Power Reserve	38 hours
Rotor Style	Ball-bearing
Rotor Winding Direction	Bi-directional
Hand-Windable?	Yes
Anti-Shock Device	Incabloc
Hand Count	3
Functions	Central hours; central minutes; small running seconds subdial at 6:00; date at 3:00
Hacking Seconds?	Yes
Country of Manufacture	Switzerland, Swiss made
Known Models	Raymond Weil Maestro Tradition, Maestro Small Seconds (Add your watch to the comments below…)

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)