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AM 72

AM 72AM 72


The Ebauches Trust (also known as Ebauches S.A.) was from the 1920ies on a roof organization of several ebauche manufactureres, among them the Adolf Michel S.A. (AM) of Grenchen/Switzerland. They made that caliber 72, a form caliber in ladies' size with a cylinder escapement.

With 6 jewels and a brass balance, it reselbes the state of the art of pre WW II: Not ultimately precise, but pretty small and reliable. Nevertheless, the high time of those tiny cylinder movements did not last very long, since equally small, but much more precise and reliable anchor movements took over.

AM 72 dial side viewAM 72 dial side view

 technical data

Number of jewels6
Shock protection(s)none
Balance cock directionclockwise
Hairspring studfixed
Regulator typeLong regulator arm
Movement constructionEscapement wheel
Fourth wheel, Third wheel, Center wheel
Mainspring barrel
FunctionsHour, minute
Beats per hour18000
Size53/4 x 83/4'''
Image in Flume Werksucher 1947 146
AM 72AMAM725 3/4 ''' 8 3/4''''''AM 726 Jewels, 5 3/4 x 8 3/4'''''', 18000 A/h


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