“My watch has stopped - Why?” -  Page 3

No. 15 and No. 15A show a perfect Escape Wheel and one with damaged teeth. All fifteen teeth must be exactly alike for a watch to run correctly. No. 15B and 15C show a perfect Escape Wheel Pinion and one which has broken, thus stopping the watch.

No. 16, No. 16A, No. 17, No. 17A depict Fourth and Third Wheels, and their respective Pivots.  A bent or broken tooth, bent, broken, or dirty pivot, in either case will stop a watch.

Center Wheel in perfect condition, No. 18, may have damaged Pinion, No.18B.  A damaged Center Wheel, 18A, may be the result of rust. Defective parts must be replaced.

The Minute Hand is attached to the Cannon Pinion, No. 19, which is fitted onto the Center Post.  This part may rust, or its may break.