Having in mind the incessant- evolution of the notion of „historical (ancient) object”, the author inte rprets regulation concerning the assay law. In the re gulations being in force since 1963 it is stated that the objects having hallmarks and being presented for th e renewed testing should be marked once again on the condition th a t the quantity of the precious metal proved to be different. Consequently, the p re viously made hallmarks should be cancelled. The author is of the opinion th a t this regulation does not account for goldsmithing research needs and makes it possible to misuse the hallmarks cancelling toals. Other regulations do not precisely define historical value of jewels appointing the caesura till the year 1860 and taking no account of the jewels dating from the end of the 19th century. The author postulates to preserve old hallmarks apart from the new ones and also to establish, within the assay offices, new divisions the task of which would be, among others, to conduct the cataloguing of hall-marks. In the conclusion the author states that the committee including the members of the trade and historical monuments protection institutions will have to prepare amendments to the assay law.