Some of the Merovingian obols, fractions of the Merovingian denier in 670-750 have the distinction of being uniface. Unlike in the Germanic environment, in the French tradition this type of coinage is exceptional. The aim of this paper is to complement the corpus with new coins which have appeared on the market, have been reported in private collections or in public collections. The corpus now includes around 100 coins. This study makes it possible to examine their metrology through a statistical study. The corpus also makes it possible to discuss techniques of production because the study of the dies shows that the same dies were used both for deniers and obols. In addition, the circulation area of these Merovingian obols can be suggested because the minting workshops are grouped in a region between the south of Neustria and the north of Aquitaine.