AM 617

AM 617 | - The Movement Archive

AM 617


The AM 617 is a relatively modern constructed and well made cylinder movement of the late time of movements with cylinder escapement.

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With 10 jewels, a cylinder movement has got its full equipment with rubies - so on this movement, too. In theory, you could add two additional jewels to the minute wheel, but until now, I’ve never seen such a cylinder movement.

AM 617: gear works

gear works

Cylinder movements were build until the mid of last century. Compared to lever movements, they were cheaper and simpler, since they contained one less moving part - the lever . The disadvantage of there movements were, that the sharp teeth of the cylinder wheel always were in contact with the balance cylinder, thus breaking a little bit. On wear of these teeth and on magnetizing, it was soon stopped.

Besides this, cylinder movement were rather inprecise - a daily rate of one or two minutes per day was not unusual.

AM 617: main plate

main plate

The AM 617 is one of the few small cylinder movements, which already used a yoke winding system. This is remarkable, since it means, that a rather cheap movement got a rather expensive winding system.

In terms of quality, this is very positive!


AM 617: AM 617 dial side

AM 617 dial side

At position “9”, you see the T-shaped escapement module, which consists of the balance bearing on the dial side and the balance cock as a unit. This constructions allows a precise depthing setting of the balance cylinder into the cylinder wheel, which is required for reliable function.

At “1”, you can see the “Ebauches Trust” hallmark.

Technical data

Size:8 3/4''' (measured: 19,1mm)
Number of jewels:10
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
  • center second pinion
  • seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:3 hole(s)
References: Flume: 1947 97

Usage gallery

AM 617: ZentRa ladies' watch

ZentRa ladies' watch

This movement was donated by Harald Hoeber and identified by Badener of the UhrForum. Thank you very much!

Other movements from AM