ERA, Vectis Centre Case With Hookbolt
ERA Vectis has been around for many years, available with a 35mm. The PZ size is 95mm and the spindle hole is split for Lever Pad option.
ERA still manufacture these centre cases for use on new lock mechanism and also sell them separately for the repair market.
The latch can be turned to suit Left Hung or Right hung doors, this is done by remoing the two pozi retaining screws and removing the latch, simply place the latch back on the centre case the position you require and replace the Pozi retaining screws