Disassembly of a classical movement

All pictures are taken using inexpensive flea-market and sceleton watches. As an amateur don’t start with your new watch!

This little Swiss Made Olma is going to be disassembled!

Before we remove the hands using a hand remover we have to protect the dial with a piece of paper.

Caliber AS 1727.

Back side showing the Balance, Wheel Train Bridge, Ratchet, and Crown Wheels

The hands are now removed with the hand remover which is shown on the right.

The movemet is out of the case and the stem is removed. Here you can see how small the movement is compared to a match! The match has a width of 2,4 mm.

Here is the bottom side of the Caliber. The bottom

Shock Protection Jewel can be seen, left. Right you

see the Keyless Works. To the very right are the

Hour Wheel and its washer. In the center is the

Cannon Pinion arbor around which the Hour Wheel

is turning.

Now the set bridge and the Minute Wheel are also removed i.e. the complete Motion Works.

The Barrel Brige and Barrel are now removed

We have now disassembled the whole keyless works. From the top you can see the Set Spring, Clutch Lever, Set Lever, Setting Wheel and in the bottom the Winding Pinion and Clutch Wheel.

The Balance Bridge with the Balance is nowremoved.

This is the front side of the movement and the

Ratchet Wheel and Crown Wheel are removed

and can be seen to the right. Above the Crown

Wheel is the Crown Wheel Ring and to the right

are the Click and Click Spring.

The Pallet Bridge and Pallet Lever is now removed.

The Cannon Pinion is removed using and old #2 Tweezers.

Finaly the Wheel Train Bridge is unscrewed!

The Wheel Train beside the Bottom Plate



All the parts in the AS1727 spread out as can be seen in the book page 32 to the left. Unfortunet I was not able to open up the Barrel. Hence, the Barrel Arbor and the Mainspring is missing in the photo.

Some more close-up pictures!

An inexpensive but illustrative skeleton movement!

It's a match to identify all the wheels!

Above you can see a magnification of the Clutch Wheel (my favorite) and the Winding Pinion. The match has a width of 2,4 mm.

HereI found the focus at the right height!!! The match has a width of 2,4 mm.

To the left is a 3D drawing of the Clutch Wheel and Winding Pinion

taken from the cover of my book!

Here you can see how the Pallet Lever Fork interacts with the Impulse Jewel.



On the back side of the Pallet Lever you can see the Safety Pin and the footing of the Pallet Jewes.

The book is Wire-O bound to cleverly stay

open at any page at the workbench!