Danish, Customs Seal, Copenhagen, Image & Found by Ged Dodd.
Found North Yorkshire, 25mm, 17.3g.
Danish crown // KJØBENHAVN / TOLD / ..TR..L
A Danish customs seal. See BSG.BS.01393 for an earlier one and BSG.BS.00475 for one of the same period judging by the crown design and possible spelling of the capital's name.