The keyless works is comprised parts that are truly metal parts grinding on other metal parts with only a thin layer of grease preventing them for destroying one another. This grease cannot and should not be applied too liberally.
Including epilame, 8 different oils, greases, solutions are used in a typical Rolex movement covering varying friction, materials, and speeds in which the part moves and rotates. These variables cause them breakdown generally around the 5 years mark +/-. You also have cleaning and rinse solutions, thread lockers, really a good list of supplies that keep your Rolex movement that keeps your Rolex movement in good health.
Truly optimal life on these materials in around 5 years. From there, parts get closer and closer to destroying one another. You get closer to this. The yellow flakes are brass flakes from either a bridge, wheel, etc that has been ground down for lack of proper maintenance at the recommended service interval.
