A rare Jacobite type glass mid 18th century

A rare Jacobite type glass mid 18th century, engraved with the motto 'Turno Tempus Erit' above a rose spray, raised on an inverted baluster airtwist stem and a folded foot, 17cm.

The phrase Turno Tempus Erit is probably borrowed from Virgil, and roughly translates to mean 'The time will come'; perhaps an insinuation that the Hanoverian victory at the Battle of Culloden could be short-lived.