Ancient clay bread-stamp. Today when someone walks into a grocery store and wants to buy a loaf of bread he could tell which bakery made the bread from the packaging. In the ancient world each baker had his own bread-stamp with a unique design. As he made the dough for a Pita he would stamp the dough with his unique stamp. Therefore, the person buying the bread would know where the bread came from. This is actually referred to in the Mishna (Baba Metzia Chapter 2) âthe bread of a baker has no uniqueness to it. Since if the baker made many loafs of bread they all looked the same.â Meaning, although the baker used a bread stamp, all of his daily production had the same design on it. Whereas the bread of an individual who doesnât mass-produce bread, his unique design would be considered a unique and distinguished mark.