When a teenage girl and her mum saw a shiny object while they were out walking in Peterborough they initially thought it was a bottle top - or a twenty pence piece.
But then 13 year old Charlene Moles picked it up - and after a trip to her local museum she discovered it was a 16th century silver sixpence. Stuart Leithes reports.
The silver hammered sixpence from the reign of Queen Elizabeth the first is 400 years old.
Experts at Peterborough Museum have confirmed that it is an authentic coin minted in 1575. It's thought the coin was brought to the surface by workers laying fibre optic cables in the area.