Welcome to Per's Horology Site!

This is the new part of Per's Horology Site. Here can all parts and functions of a classical movement be found

The pictures are taken with a Canon PowerShot G9!

My book is now available again! ORDER HERE!


The basic functions of the movement:

   - The Keyless Works

   - The Wheel Train

   - The Escapement

   - The Balance

   - The Motion Works  

   - The Bridges and Cocks

   - The Hands and Dial

All parts of a classical movement

Site and Movement overview


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This site is done just for pleasure - mine - and hopefully yours! The intention has not been to make a complete watchmaking lecture. Rather it is a broad overview what's in a classical watch movement and to some extent how the different parts work together.


In the above figure, the two movements are shown, that are used in this site , the upper two are front (naked) and back (in a casing) views of the movement from an inexpensive skeleton watch.  The lower one is the main plate of a higher quality movement, identified as an AS1727 movement from 1965.  It has the following specifications: manual wind, sub-second, 8.75''', diameter = 19.4 mm, thickness = 3.45 mm, 17 jewels, f = 21 600 A/hr, power reserve = 41 h. The size of the movements are all rather small compared to a standard Swedish match.

This figure shows all the parts in the AS 1727 movement. In the center is the main plate, top right is the mainspring and motion works, next (cw) is the three wheel train wheels followed by the escapement/balance parts, the bridges and cock, and finally the keyless works parts.


Finally, this figure shows all the screws in the AS 1727 movement as compared to the standard Swedish match! As can be seen some of the screws are very small and hence challenging to handle. The purple dot is one End Stone.
Be carefull in there ;)    /Per
December 2007