MST Roamer caliber 264 watch movement

Roamer Caliber MST 264

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MST Roamer caliber 264 watch movement

Brand Roamer
Caliber Number MST 264
Movement Type Manual wind, mechanical
Diameter 12”’ (26.70mm)
Jewels 15
Lift Angle 42 degrees
Power Reserve 42 hours
Vibrations Per Hour 18,000 bph
Balance Staff 7447, 7448, 7449
Hairspring MST 1235
Hands 1.50 / 0.80 / 0.19
Features Hours, minutes, sweeping small seconds
Country of Manufacture Switzerland
Production Years 1930s
Known Models Please 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 wahawatches.com 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 wahawatches.com

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