I can provide a feedback on vintage Blancpain... Aaah, no, I owned two modern Blancpain, one without problem, a FF 50th anniversary, and a Leman Chrono perpetual calendar whose hands were used to have a walk in the dial, twice.
Here is one recently auctioned by Phillips, a pretty nice TR 900, with a very low number ( 6 ). In case Santa didn't receive your wishes, yet. Best, Nicolas ...
Lookin to pull the trigger on a Bathyscaphe in 2022. Blancpain seems to be quite popular on WPS. Would be curious to receive any feedback on what kind of ownership experience Blancpain provides.