Does anyone know the first year that the Sinn 656 was introduced? EDIT - The Sinn 656 was first introduced in 2002.
This version is rated at 10 bar. Does anyone know if Sinn made changes to the 656 design to upgrade it to 20 bar, or if they only did more rigorous testing to realize the 10 bar models held up to 20 bar?
I recently picked up a 656 that was produced in 2002. I immediately sent it off for repair and servicing at RGM because the crown tube was stripped. While I'm eagerly awaiting that process to finish up, I'm reaching out to learn more about the watch.