The paper presents an important evidence of ethnographic tribula from the south-eastern Balkans, which inserts are commented as a referential corpus to a series of archaeological tribulum inserts identified by the author and coming from a Late Chalcolithic site in Bulgarian Thrace. Archaeological tribulum inserts from Bulgaria can be recognized because of their striking similarity to ethnographic examples in morphology and shape, and especially in microscopic wear features.
The paper also presents the results of a micro-wear analysis, made by the author, of a series of Canaanean blades assemblages from different areas in Israel (from the Negev to the North Mediterranean zone and Galilee). The study aimed to verify the concept of Canaanean blades used as tribulum and not as sickle inserts. Ultimately, the results have been tested in resolving one of the crucial problems in the theoretical background of use-wear studies: that of the establishment of reliable patterns for distinguishing the micro-wear characteristics (polishes and accompanied striations) of sickle and tribulum inserts.