Many thanks all.
I have had a look at all the suggestions.
The Osculati is the closest.
Note that the snib is not a rotary snib a 12 oclock, but a push button at 3/9 oclock
Backset is 47.5 instead of 50…./ but near enough.
Note there are 2 faceplate thicknesses for the privacy set option for different door thicknesses.
Part numbers 38.409.72 or 73