Not that easy for me this week. π
- But as I practically have no really ultra-thin watch, Iβll try to name some βrather thinβ pieces..
Hope these (somehow) fill the bill..

JLC E502, Futurematic, (Porthole: left winding status, rt: seconds hand) - at least a rather thin dresswatch..

Really love its vista on the wrist

2 JLC Memovox Parkings (E3161) are better than one to avoid a parking ticket..

Love its appeal..

A dressy slim Reverso Trio ( left & rt: Tribute Small Second, green & blue/ middle: Tribute 1931)