Canberra ejection seats
 

Is there anyone out there who could answer a query on the Mk.1CN seat?
I know that this replaced the Mk.1C seat in the Canberra, and that by
around 1960 it incorporated the MB automatic harness release and leg
restraints.
Wondered if you knew whether the addition of the MB attachments
to the 1C led to the 1CN designation, or whether that designation was
applied to seats with further mods.