[Tools]

I think that this is a bit twisted perspective.

The Speedy used a Delrin synthetic brake in its movements from the late 70's because of the superior specs for this part. In the clear case back Speedy, they went back to a metal brake for aesthetics since Delrin has a different look. Delrin is a high-tech space age polymer - much more than the usual image of "plastic".

Rolex has used teflon coated reverser gears (the purple gears seen on the backside of the movement) for decades due to wear and friction considerations, just like Omegas Delrin use.

Rolex latest introduction into the hairspring arena is Syloxi, a synthetic silicon product. Syloxi hairsprings are presently used in the Lady movements but may eventually pass the "old" Parachrom.