Prince William has been wearing the same Omega Seamaster 300m, a gift from his late mother, Princess Diana, for over 20 years.
Which makes the appearance of a Garmin smartwatch on his right wrist all the more noteworthy.
The Prince of Wales was spotted adopting the fashion for wearing two watches on a visit in January to a food bank in Windsor.
Perhaps, after turning 40 last year, the future monarch is monitoring his mid-life health and wellness more closely.
The Garmin Forerunner 245 is the perfect piece of kit for the job.
Retailing for a less than princely $300, the smartwatch is far more than just a step counter.
It has an onboard training coach with suggestions for peak health and fitness; sports apps that know what exercise you are up to and monitors tracking heart health, blood oxygen levels, stress and even a person’s body battery.
It will display incoming messages and all data is stored and shareable via the Garmin app.