First launched in 1971 as a watch designed notably for speleologists (cave explorers), the Rolex Explorer II was meant to be an extension of the distinctive time-only Explorer model and these two watches are nonetheless equipped alongside each other to immediately. It may have spent portion of its historic previous as considered one of many mannequin’s most commonly missed sports activities actions watches, nonetheless the Explorer II has been gaining a complete lot of recognition in current occasions, and there are literally prepared lists for it at retailers throughout the globe.
An identical to the GMT-Grasp assortment, the Explorer II has an extra 24-hour hand that circles its dial – and equivalent to the Rolex GMT-Grasp, the Explorer II moreover has a bezel that choices 24-hour markings. So, are you able to make the most of the Rolex Explorer II as a GMT watch?
Rolex Explorer II

Explorer II Fast Data:
- First launched in 1971.
- Initially designed notably for speleologists (cave explorers).
- Solely ever manufactured in stainless-steel.
- Solely fitted with each black or white (“Polar”) dials.
- Comprises a date present on the three o’clock location.
- Comprises further 24-hour hand and caught 24-hour bezel.
- Waterproof to 100 meters (330 ft).

What’s a GMT watch?
Sooner than we dive deeper, it’s essential to cope with the question: what’s a GMT watch? This time interval usually will get misused to elucidate any timepiece with a lot of timezone exhibits. Nonetheless, to exactly reply what’s a GMT watch, we must always specify that it applies solely to fashions that features a additional timezone displayed in a 24-hour format. This distinction is important in understanding the distinctive efficiency of GMT watches and models them other than completely different multi-timezone timepieces.
There are many dual-time watches obtainable in the marketplace and loads of others that perform 24-hour exhibits on them, nonetheless to make sure that a watch to truly be categorized as a GMT, it will need to have the pliability to concurrently present a number of timezone and a form of timezones should be represented in an accurate 24-hour format.
Is the Rolex Explorer II a GMT?
All Rolex GMT-Grasp watches are GMT watches (as one would hope, supplied that “GMT” is of their determine), nonetheless not all Rolex Explorer II fashions could also be categorized as GMT watches – regardless of the reality that every one of them have further 24-hour hands-on their dials.
A 24-hour format is definitely considered one of many stipulations for outlining a GMT watch, nonetheless the completely different requirement is that the watch ought to be succesful to indicate two or further timezones. On the very first iteration of the Rolex Explorer II (the Rolex 1655 from 1971), the additional 24-hour hand was utterly synchronized to the standard 12-hour hand, merely shifting at ½ the speed throughout the dial.
Whereas there are nonetheless two utterly completely different hour palms on these watches, the 24-hour hand was little larger than a distinguished AM/PM indicator to be be taught in opposition to the mounted 24-hour bezel. It is not going to be until the arrival of the second period inside the mid-Eighties that the Rolex Explorer II would purchase the pliability to function like an actual GMT watch.

Which Explorer II fashions will be utilized as a GMT
Except for the very first iteration of the model (the ref. 1655), all completely different Rolex Explorer II references will be utilized as GMT watches. This accommodates the subsequent 3 fashions, all of which will be discovered with each blacl or white dials:
- Reference 16550: Launched in 1985, the Rolex 16550 marked a significant evolution inside the Explorer II line. This transitional model featured an even bigger 40mm case and equipped every black and white dial selections. Notable for its “rail dial” variants and the tendency of its white dials to develop a creamy patina, the 16550 is extraordinarily wished by collectors. It launched the caliber 3085 movement and sapphire crystal, enhancing the watch’s sturdiness and precision.
- Reference 16570: The reference 16570, launched in 1989, refined the Explorer II design and had an prolonged manufacturing run until 2011. This model maintained the 40mm case measurement and equipped every black and white dial selections. The Rolex 16570 seen a lot of updates over its lifespan, along with a change from tritium to SuperLuminova for its luminescent supplies. It housed the caliber 3185 movement, recognized for its reliability and accuracy. The 16570’s enduring design and adaptability have made it a favorite amongst fanatics.
- Reference 216570: Launched in 2011, the Rolex 216570 launched essential updates to the Explorer II line. This model elevated the case measurement to 42mm and reintroduced the distinctive orange 24-hour hand, paying homage to the distinctive Explorer II. The 216570 choices Rolex’s caliber 3187 movement, offering improved magnetic resistance and shock absorption. On the market in every black and white dial variations, this reference modernized the Explorer II whereas sustaining its adventurous spirit and efficiency.
Which signifies that if any considered one of many following statements is true about your specific watch then it’s seemingly one of many Rolex Explorer II fashions that may be utilized as a GMT.
- Your watch has a sapphire crystal.
- Your watch has a reference amount with 5 or further digits.
- Your watch has a white dial.
- Your watch has a case diameter of 40mm or greater.
- Your watch has blue-glowing luminescence.
Given that 24-hour bezel on the Rolex Explorer II does not rotate, the two hour palms should be independently adjustable to make sure that the watch to be used as a GMT. With that in ideas, if any of the above statements applies to your specific watch, then it signifies that your Explorer II is probably going one of many fashions that includes a movement that choices independently adjustable hour palms.

The way in which to make use of the Explorer II like a GMT
To utilize your Rolex Explorer II like a GMT watch, you may wish to configure it so that your individual residence or reference time is displayed by the 24-hand, whereas the time in your current location is displayed by the standard 12-hour hand. Your native time will seemingly be be taught inside the common strategy with the hour and minute hand in opposition to the dial, whereas reference time will seemingly be indicated by the place of the 24-hour hand in relation to the 24-hour scale on the mounted bezel.

Explorer II GMT Working Instructions
Sooner than you prepare your Rolex Explorer II to function as a GMT watch, it is first important to note that there are three utterly completely different positions for the winding crown and counting on the place, rotating it could interact a particular part of the movement.
- Place 1: Handbook winding place; crown is unscrewed from case, rotating the crown will wind the watch.
- Place 2: Native time setting place; crown is pulled out one notch, seconds hand stays to be working, native hour hand will bounce forward or backward when crown is rotated
- Place 3: Reference time setting place; crown is pulled out all the easiest way to the second notch, seconds hand stops working, every hour palms and minute hand switch when crown is rotated.
Step 1 – Setting Reference Time
The very very first thing you may wish to do is to line up the entire palms when you set the reference time (home time) in your watch, since synchronizing them now will help make the rest of the strategy easier. To do this, merely pull out the winding crown all the easiest way to Place 3 after which rotate the palms so that all of them line up with the 12 o’clock marker.
From proper right here, you may wish to protect rotating the palms until your required reference time is displayed by the 24-hour hand and the minute hand. Remember, it should always be in a 24-hour format, with the 24-hour hand pointing to its corresponding value in opposition to the 24-hour scale on the outside bezel.
Step 2 – Setting The Date
The next issue you may wish to do after setting the reference time in your watch is to set the date. To do this, press the winding crown in a single notch to Place 2. On this place, the seconds hand will resume working and rotating the winding crown will bounce the native 12-hour hand forwards or backward in one-hour increments.
As a result of the 12-hour hand passes midnight, the date will change. Maintain rotating the winding crown until the suitable date appears inside the window on the three o’clock location. It is extremely essential remember the fact that given that native hour hand exhibits time in a 12-hour format, the date present will solely change as quickly as every two events that the native hour hand circles the dial.
Step 3 – Setting Native Time
Whereas leaving the winding crown in Place 2, proceed to advance the native 12-hour hand until it exhibits the suitable time in your current location. Since this generally is a commonplace 12-hour hand, you have to to take phrase all through this step of whether or not or not the native hour hand is displaying AM or PM hours in opposition to the dial.
As quickly as your native time has been set, press the winding crown once more in all the easiest way and screw it once more all the best way right down to the case. This ensures that your Rolex Explorer II stays proof against moisture and dirt.
Learning GMT Time with Your Rolex Explorer II
Collectively together with your Rolex Explorer II appropriately set as a lot as function as a GMT watch, you be taught the current time in your native timezone with the traditional hour hand minute palms in opposition to the dial, whereas the time in your home or reference location will seemingly be displayed by the 24-hour hand in relation to its place in opposition to the bezel. This shortly permits you to concurrently see two utterly completely different timezones and since your reference time is always indicated in a 24-hour format, there’ll seemingly be no confusion with regard to AM or PM hours, even whether or not it’s on the precise reverse aspect of the world.
An additional advantage of this mannequin of GMT watch is that its leaping native hour hand is right for journey. For example, let’s say that you just’re flying from Los Angeles to Switzerland and you have got a layover in New York for a lot of hours. New York Metropolis is three hours ahead of Los Angeles, so when you land on the East Coast in your layover, merely unscrew the crown and bounce the native hour hand forward three hours so that your watch will current the exact time in your current location.
After your connecting flight when you land in Switzerland, merely bounce the native hour hand forward as soon as extra and your watch to copy the time in your new location. When adjusting the native hour hand, the seconds hand and minute hand keep shifting, so adjusting your timezone does not disrupt the timekeeping precision of your watch. Furthermore the time in your home metropolis (Los Angeles) will always be displayed by your 24-hour hand, so that you just obtained’t accidentally identify home and wake everyone within the midst of the night by inadvertently getting your AM and PM hours mixed up.