True North by Arnold and Son “The Real Deal”
March 6, 2008
The True North Perpetual is one of the most amazing mens watches from Arnold and Son that shows their commitment to superb craftsmanship. This is a mechanical manual-winding movement that has 7 day power reserve.
It still has Cotes de Geneve designs within its movement. The movement runs on a single barrel spring that determines the high precision of this watch. Its highest precision can be experienced within the first 4 days of elapse.
The company produces only limited edition of this watch where only 25 pieces are made with platinum, or white gold, and palladium alloy. The case is 45mm in diameter with a transparent caseback made of sapphire crystal.
Within its white dial there are many indicators and counters. Its moon phase located at 9 is calculated base on 29.5 days with a true visible face of the moon.
There is also the perpetual calendar where the date counter is presented at 4, and the month and leap year is indicated at 1.
True North Perpetual can provide double equation of time where it is able to show the time difference between true solar time and mean solar time. This indication is placed at 7 where it is presented in minutes.
It needs to incorporate the true solar time dial mechanism to allow speed in its calculation. It is the first watch to indicate the true solar time at a particular place and also present the true geographical North at noon solar time.
The 24 hour hand with a solar shape can assist in indicating the second time zone or local time zone simply by adjusting the true Solar Time against the outer dial ring after correcting the difference in location. The hand is adjusted with the pusher at 10.
To allow for changing time zones, it would just need to adjust the outer dial ring by the difference between the longitude of the current location and the longitude of the time zone center.
This outer dial ring can be easily adjusted with the crown at 8. It also helps to include daylight saving correction into the watch with this mechanism.


