BSG.BS.01888 — Anti-tamper Seal

Found in North Yorkshire, 20mm.

Faint inscription & markings on both sides

From finder, "On one side, I think I can see the letters BASI, I think it may just be partial text though. There may be some sort of design below the text."

From Steve_JT, "another possibility is a seal off an engine diesel pump from a tractor or other machine. They were used to stop people tampering with the diesel delivery to the the engine or governors, that could increase the power of the tractor".