Kafkania pebble

The Kafkania pebble is a small rounded river pebble about 5cm long with Linear B symbols and a double axe symbol inscribed on it. It was found in Kafkania, some 7 km (4.3 mi) north of Olympia, on 1 April 1994 in a 17th-century BC archaeological context. If it were genuine, it would be the earliest written testimony on the Greek mainland, and by far the earliest document in Linear B. However the inscription is possibly a modern forgery.
More information on the Wikipedia page which gives some of the reasons for considering it a fake, with some discussions on the talk page. There is various other coverage on the internet, of varying degrees of validity.
Category:Fakes and forgeries
Category:Archaeological artifacts
Category:20th century