Do I understand all the functions? At some point I got to about 80-90%. But memory and complexity don't always match.
FYI I believe that UN has only one or maybe two sets left. Not sure if there is intent to produce more. Not sure how often they come up on the secondary market though one of us did find one.
The pleasure in wearing a watch from this series is fantastic but so under the radar. Using the watches for their function? Not so likely, how many use the chronograph? But it's there and It is phenomenally crafted. That it is on an ETA base, who cares. In fact the ETA was used because at the time it was the studious movement around and had the power to allow the functions to work.
Just some thoughts.
A magnificent set and one worthy of a grail.