Got another beautiful Gerald Genta watch today: a Universal Genève White Shadow with an in-house, micro-rotor automatic movement. It was the world’s thinnest automatic movement (2.5mm) for over a decade after its introduction in the mid-60's. Today if one wants a slim in-house microrotor, you've to buy a Patek.
Out of the box, it runs at +3s/day but with a large Δ, so it will need a full service.