unknown cylinder escapement movement (3)

Description

Like most cylinder movements from the time before 1920, this 40mm diameter cylinder escapement movement from a pocket watch cannot be assigned to a manufacturer and hence there’s no caliber number, too.

With 6 jewels in total (two pairs for the balance wheel bearing- and -cap jewels, and a pair of ruby bearings for the cylinder wheel), it is only of medium quality.

The gear train construction follows the usual scheme mainspring barrel - minute wheel - third wheel - seconds wheel - cylinder wheel. The latter, as usual, has a very short axis and its flat cock is located below the balance wheel.

The monometallic annular balance with its three spokes is, of course, not yet shock-resistant. It beats slowly with 18,000 A/h, which act directly on the cylindrical wheel.

The accuracy of such movements is usually in the range of minutes per day; with a little luck, it can be improved somewhat with the help of the long regulator arm.

On the dial side, you can see the yoke winding mechanism, which can be switched from winding to hand setting with the help of a pin on the case that acts on the setting lever.

The escapement, the combination of balance wheel with cylinder and cylinder wheel, can be removed as a module and repaired and adjusted outside the movement.

Technical data

Usage gallery