The article is devoted to Schönwarling/Skowarcz and Dollkeim/Kovrovo-type crossbow fibulae with a long narrow foot and a full catch-plate, one of the most characteristic chronotypes of the Migration Period. The authors describe a number of specific construction features of the fibulae in the Sambian-Natangian culture area, which define their typological placement. Based on the results of a comparative analysis of prewar and modern archaeological sources, the authors propose an up-to-date specified chronology of these types. Contrary to the currently popular hypothesis, the analysed archaeological material in the Sambian-Natangian area does not demonstrate co-existence, but instead the smooth replacement of Schönwarling/Skowarcz fibulae by those of the Dollkeim/Kovrovo type in the transition phase D2/D3, i.e. about 430 AD.