Dutch Animal Tag Seal, Image by StuE, Finder unknown.
Glemsford, 20mm diam, 18.0g.
The rivet displays a portion of the crowned Dutch shield bearing the rampant lion of Holland // (A)CC with the numbers below.
An excellent example of a Dutch customs seal of the type with long strip of lead joining both lobes forming a loop (See other Dutch Customs Looped seals).
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.