A signature – or maker’s mark - designates the artisan who had made an object. It is either composed of the three names commonly used in the Roman world, or of an abbreviation of a simpler name. A signature is sometimes described as a stamp. It is affixed on the mould or the model (called archetype) with a stylus or a seal. Then it can be reproduced in large numbers. So, maker’s marks, which were affixed with a stylus or a seal, played the role of our present logos.
Poinçon de potier en os pour l’impression en creux de l’estampille (signature), la Graufesenque. Coll. Musée de Millau et des Grands Causses