Black Garmin smartwatch with blue strap—found near Colchester Castle

I found a black Garmin smartwatch with a bright blue silicone strap this afternoon around 3:45pm in the car park behind Colchester Castle in Essex. It's in decent condition, a few light scratches on the screen and a minor scuff on the bezel. The back has a small engraving that reads 'M.K. 04/08', and the strap holes are a touch stretched from regular wear. The watch is about 42mm with a rugged, sporty look and the Garmin logo is clearly visible on the face. If you recognize it, drop me a message here and we’ll arrange a safe handover to the owner.