KIH[Purist]
12054
Opus Two by Antoine Preziuso....
Wow, the word I could think of when I saw this in the wild. At some monthly small g-t-g, it was sighted and wow!
I will let the pics speak for itself!
I found on a man's wrist, mind you. He changed the strap to white for the coming season... 
Opus Two, Perpetual, Tourbillon, By Preziuso, Antoiine
Hunter case....
Month, Date, Day, and perhaps leap year indicator...
This was my watch of the night - 42mm.
And, 38mm Op. 2
A bit thick....
But no problem!
Beautiful.... Preziuso tried to make this shine without using diamond.... according to the owner who actually spoke with him....
By winding (manual winding), the gear close inside the bezel turns and that in the end winds the spring in the barrel. Interesting show!
See the gear inside the bezel, surrounding the dial or the front of the watch?
Beautiful blue hands...
Really impressed.
A few of other participants' wrist of the night....
I was totally impressed by the Op. 2 and it was my first encounter with it. Very impressive piece - a bit heavy and hefty side, but definitely wearable - if HW lets ME wear is the different question, though

Thanks!
Ken