I saw them two weeks ago at the Paris Boutique, after Geneva.
I already made some posts about them, and yes, I'm enthusiast for this Chrono.
Nicely made and thought, it has all to be a hit, IMO.
No sapphire case back?
No big deal!
The Cal 751 is a very good movement, but nothing exceptional to see through a sapphire case back.
In this case, I really think JLC did well with this solid case back.
I prefer to see them dedicated to very nice movement,s such as rhe Duometre, for example.
You just got a magnificient Chrono....Big congratulations!
Best,
Nicolas