The Vianney Halter x Massena Lab Old Soul, if you view the design through the lens of Late Steampunk Robotics, the finishing, the movement imo its a Masterpiece, highly underrated and lost in the avalanche of new releases. If you think about it, he has never done a watch like this before.
However, like All Great Chefs, there is a Bistro version where you get all the flavor in a less formal atmosphere. The Louis Erard x Vianney Halter Le Regulateur II Monochrome.

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