Not really a lot of info. How long ago did you see it? Was it new or pre-owned? How complicated? My father previously owned a Patek 5015 in yg. It had black hands, a white porcelain dial, and subdials for small seconds, moonphase, and power reserve. I also liked the officer's case with gold hinged back, which could be opened to a saphire display back to show the movement. It could also have been PAtek 5054 which was almost the same except for different bezel, Roman Numerals, and they added a date around the moonphase. Those might be two of my best guesses. Many of Pateks complicated pieces use gold hands rather than black. There have also been some very basic time only Patek's with hob nail bezels that had black hands and often a hob nail bezel. Good luck. One of the few clothing brands using nice movements is Ralph Lauren. Many of his watches use JLC movements. But for what they cost, I'd rather have a JLC watch.