A system established by the Association Patronale de l'Industrie de l'Arc-horloger (APIAH, an industry organization in the Swiss watch industry) that drafts tables indicating gold prices per type of alloy (yellow gold, white gold containing palladium, red gold and platinum), per price of gold used in the alloy and ancillary costs such as immobilization of raw material, irretrievable waste, part of refining costs and production costs.

Invoicing is termed "Cofiter" when the metal used in the alloy is supplied by the client. These prices are only consultable by APIAH members but widely used in the watchmaking value chain.