Patek Philippe Annual Calendar Regulator Archived helium and oxygen rather than

helium and oxygen rather than the standard nitrogen and oxygen

Technically speaking

But for every well-known name in the dive watch world

manual wind movement was equipped with a hacking feature - a mechanism that stopped the second hand from moving when setting the time - enabling soldiers to synchronize their timepieces to incredible accuracy for elite operations and coordinated movement

5 years old - but we have a pretty strong feeling that this model will be the one to own in the coming years

Patek Philippe Annual Calendar Regulator Archived helium and oxygen rather thanThe annual calendar is a complication invented by Patek Philippe. While it plays second fiddle to the perpetual calendar in the minds of most collectors, the reality is that the construction of this calendar mechanism is by no means a simple feat, and requires impressive micro engineering and design acumen to execute well. Able to account for months of different lengths, it only requires manual adjustment once per year at the end of February. This