I will bet..say 2012, just 4 to 5 years.
It is over crafted, over labored, totally unique..100% in house...and made by THAT one iconic person.
Of all..only the Antiqua, opus 3 and THIS watch are very very "strange"...and that strangeness is the essence of the "Vianney".
The GF is also the "least" understood and undesired...and about the most costly.
All the ingredients for becoming the ultra collectable.
CONGRATS!