Cloth Seal, Dutch, Muiden, Image & Found by the Sambian Archaeological expedition, Institute of Archaeology, Russian Academy of Sciences.
Found Near Kaliningrad / Königsberg, 28mm.
Lion rampant // shield bearing fess, inscription around
Lion rampant is in the style of the lion of Flanders and the arms on the shield are consistent with those of Muiden, a city and former municipality in the Netherlands, in the province of North Holland.
See Euro-Plombs for other examples with more of the inscription visible.