marcio,
The others have given their ideas and votes between the tank LC and MC watches.
For many years, Cartier fans have been asking for a Tank LC with mechanical movement because recently, they only came with quartz movements.
Meanwhile, they introduced a modern Tank MC with curved profiles but in a larger modern manly case. The Tank MC has been a great success from Day 1. It even distracted me from my search for a vintage Tank LC with mechanical movement.
Cartier recently put an ultra thin Piaget 430P base movement, suitably renamed MC430 and with the usual Cartier decorations in the Tank LC. They don't show the movement, ostensibly because an exhibition window will add thickness to the watch and the raison d'etre of the tank LC is slimness.
Cartier is proud to show the MC 1904 movement in the Tank MC because it was their first in-house, automatic, "tractor engine" and they have space with the curved case to put in a window.
My latest plan is to get a modern Tank MC as shown, for all the reasons in this thread.
Then, get a vintage Tank LC because that has all the romanticism and heritage of the original Louis Cartier style.
Now, you have another set of data to make a decision.
Eventually, it will be a Heart reason rather than a Brain reason.
Regards,
MTF