MST Roamer caliber 264 watch movement

Roamer Caliber MST 264

MST Roamer caliber 264 watch movement

Caliber NumberMST 264
Movement TypeManual wind, mechanical
Diameter12”’ (26.70mm)
Lift Angle42 degrees
Power Reserve42 hours
Vibrations Per Hour18,000 bph
Balance Staff7447, 7448, 7449
HairspringMST 1235
Hands1.50 / 0.80 / 0.19
FeaturesHours, minutes, sweeping small seconds
Country of ManufactureSwitzerland
Production Years1930s
Known ModelsPlease add yours to comments below…

The Roamer/MST caliber 264 was introduced in circa 1927 and was found in watches until around 1938. This movement was produced in Solothurn, Switzerland.

The example shown above is from an early model 264 which had an early anti-shock system added in later versions. This caliber evolved into the caliber 296. While both calibers share some parts, a distinguishing factor is the 296 had a more economical single train bridge, compared to the three finger train bridge in the 264.

Notes from in reference to the movement pictured:

This is one of the bigger movements with 12 ligne… Looking at the (lack of) shock protection, this is an earlier model. Circa late 1920s or early 1930s… the bridges of this three-finger wheel-train bridge are all separate. Later MST movements (and Buren movements, for example) have similar looking bridges but they are 1 piece.

Roamer Watch Company was founded in 1888 and watches are still being made under the Roamer name. The letters MST come from the initials of the founders. They established the Meyer & Studeli movement factory in 1905 and by 1952 they were making watches fully in-house with the name Roamer. On the caliber above, the MST stamp is partially visible behind the balance wheel.

Please share your experiences and thoughts about the caliber 264 in the comments section below…

Caliber submitted by

You are reading Caliber Corner, the most popular resource for watch movement pics, specs, mods and DIY repairs. Follow @calibercorner on Twitter, Instagram and Facebook. Subscribe to the YouTube channel. Join our mission to spread movement awareness. Sign up!
What do you think about Roamer Caliber MST 264? Keep comments respectful and follow our community guidelines.
Notify of
newest most voted
Inline Feedbacks
View all comments
Service: Roamer Cushion MST 264 - WahaWatches
4 years ago

[…] movement is an MST 264. This is one of the bigger movements with 12 […]

2 years ago

I buy watch with this movement by totally ruined. But I fix it and install a balance wheel from soviet Pobeda watch. And it`s work!!!

Venus Caliber 178
Would love your thoughts, please comment.x