Caliber: at the beginning the denomination indicated only the size of a watch movement.
Today, caliber designs a precise movement type, indicating the size, the style (men/ladies’ – mechanical / automatic/ Quartz - number of hands – calendars – complications), followed by the mark of the Ebauches manufacturer (e.g. see [1] ), duly registered with the Swiss Federal Trademark Office as well as by the Federation of the Swiss Watch Industry FH.
Each single Swiss Made movement must be marked with the caliber indication.
Following WTO’s rules applicable for Custom’s & Excise, the precise caliber must be indicated on each export invoice with the coordinated international Custom’s code.
Proper markings and calibre indication has become all the more important with the increased counterfeiting of “bona fide” Swiss Watch Brands.