Union 78mm Upright Mortice Lock 3 Lever Polished Brass
Overall length (from face plate to back of lock) is 77.5mm. Backset (from face plate to centre of spindle hole) is 57mm. Face plate measures 25.5x152.5mm. Receiver plate measures 25.5x140mm. Lock centres (distance from centre of spindle hole to centre of key hole) are 57mm.