> Interestingly, hacking seconds have become so ubiquitous, that some watches will advertise the "lack" of hacking seconds.

> I.e. in the Rolex GMT, when you adjust the hour hand independently of the seconds hand, the seconds hand continues moving (non-hacking)

Rolexes have a hacking mechanism, but it's usually only activated when you pull the crown out to the furthest/third stop, which is where you set minutes. The changing of the hour for timezones generally happens in full-hour increments (with exceptions, e.g., Newfoundland).

The original Rolex GMTs did not have hacking, but it was added later; 1971, AFAICT:

* https://www.analogshift.com/blogs/transmissions/guide-to-rol...

This hacking/non-hacking functionality is fairly common on GMT/dual-timezone watches.