Dutch Customs Loop Seal, 155, Image by StuE, Found by Allsopp.
Found in the Staffs area.
The rivet displays a portion of a crowned shield bearing the rampant lion, the arms of Holland.
The other side has ACC (Accynsen?) with the control number 155 below.
An excellent example of a Dutch customs seal of the type with long strip of lead (100mm) joining both lobes forming a loop allowing it to fasten to a cow's tail.
See PAS LON-8FDA34 "Lead-alloy seal for attachment to a cow's ear. One side has illegible lettering and possibly '78'; other side has a rampant animal with staff/sword all below crown. These seals attached to the ears of live animals imported from the Netherlands from c. 1814 on, probably into the 20th century (Geoff Egan, pers comm)."
From Jan van Oostveen, "It was only used for the tail and not for the ear. ... from authentic documentation from the mid-19th century where it is mentioned how these seals were used. [Scheffer, D.H., 1909. De Geslachtswet. Amsterdam.]" See Oostveen, J. van, 2019, Tax seals used in The Netherlands as proof that 'accijns op het geslacht' was paid.