Robin,
Thanks for the report about Montblanc Heritage Chronometrie Collection.
In fact, it looks like more parts in a series are planned.
I have a question about the Heritage Chronometrie Ultra Slim.
How do they ascertain its chronometry if there is no seconds hand? I believe that C.O.S.C. does it optically nowadays with automated digital photography of the seconds hand position every 24 hours precisely. This gives the daily gain / loss seconds to calculate the "daily rate".
Regards,
MTF