ACH Seal

ACH Seal, Image & Found by Old Man.
Found within a 3 mile radius of Colyton in Devon, 17mm, 9.4g.

ACH curved across the top of one side with 125 beneath, possibly with a 0 in front and slightly below. The other side has LG(2?) showing. Traces of iron mark where a wire attachment was.

Possibly a utilities security seal.

Photo info