Zenith - Good question. I have no idea. We all know that Rolex used it for the Daytona till 2000 and that it was modified ( 28, 800 vph ). But for the other brands, I don't know.

Good question. I have no idea. We all know that Rolex used it for the Daytona till 2000 and that it was modified ( 28, 800 vph ). But for the other brands, I don't know.

Feb 12, 2022,07:55 AM

By: E Taylor : February 9th, 2022-17:49

If/when did Zenith stop allowing the El Primero to be used in other brands?

By: amanico : February 12th, 2022-07:55