The original Mantis 1 lock has a unique gearbox featuring 86/117mm centres. Please note that older versions of this lock do not have any markings on the faceplate.
Operation: Lift lever or double spindle nightlatch.
Latch reversal: Undo the screw or screws (depending on the model) in the latch to remove. Reverse, reinsert and replace screw(s).