One dates from 1976, the other from 2022.
Both are quite stunning in their own way, but the first one is my personal favorite.
Best, Emmanuel
A/ Ref. 4075BA powered by caliber 2090 (1976)
30 mm yellow gold case

credit: sagartolaney on reddit & antiqurious (caliber only)
B/ Code 11.59 Selfwinding Flying Tourbillon ref. 26396NB.OO.D002KB.01 powered by calibre 2950 (2022)
41 x 11,8 mm white gold & black ceramic case



credit: @horology_ancienne & monochrome (4 last photos)