Citizen Promaster Sky JY8100-80L

Regular Price $1,277.50
In Stock
Shipped immediately on all weekdays when ordering before 15.00(CET)
This watch is designed and produced by Citizen, and it belongs to their very popular Promaster collection, which consist of some of the market's best and most popular diver's watches. Watchia.com is an authorized reseller of Citizen, and we only sell genuine products that comes with valid warranty.

Product added to cart!


Official reseller
We are an official reseller of all brand's watches that we sell. That equals to: genuine watches with valid warranty and access to official service.

Citizen Eco-Drive
A Citizen Eco-Drive watch is a batterydriven quartz watch that is energized from all types of light (not only sunlight). The energy is stored in a rechargeable battery that never has to be replaced.

Date display
The date is shown on the display.

Display of day and date
Current day and date is displayed on the dial/screen.

Perpetual calendar
This watch is equipped with a perpetual calendar, mechanical programmed to always display the correct date, until 28th of February 2100. It also adjust for leap years.

12 + 24 hours
The time is also presented in 24 hours format.

Energy level
The level of energy for this watch's battery is displayed on the dial/screen.

Luminous layer
A luminous layer provides a long-term lightning effect in the dark. It requires only a short-term exposure to light. Usually the pointers, and sometimes the hour markers are coated with this.

Indicator for battery power
An indicator shows the current level of the battery.

World time
With this function it is easy to insert the correct time zone, and with that in place - this watch will give you the correct time.

Stopwatch function - 1/100 sek. - 24 hours.
Preliminary time, split time and final time are measured down to 1/100 of a second's accuracy. The measuring capacity is up to 24 hours.

Radio signal receiver
Whether you are in Europe, North America, Central America, China or Japan, this watch can receive the appropriate radio signal to keep your watch "in time".

Titanium bracelet
Stylish and lightweight - makes titanium bracelet extra special. This high quality material is resistant to corrosion and is very gentle to the skin (no nickel), so it could be used by people with nickel allergies.

Sapphire glass
Sapphire is up to 7 times harder than steel, and surpassed only by diamonds on the Mohs scale. This makes sapphire glass a great protection for your watch.

Quartz Watch
A battery-powered quartz watch is controlled by fluctuations in a crystal of the mineral quartz. These oscillations change very little over time, which is why quartz is often used - because it retains its accuracy.

Water protection: 200 meter (20 bar)
This watch can be worn while swimming/snorkeling (near the surface). The value refers to the pressure in water, at that depth, while motionless... and should not be seen as the depth for wearing the watch..

Condensation - important!
Rapid changes in temperature can cause condensation inside the watch. If you notice moisture beneath the glass, you should immediately go to a watchmaker, who can open and dry the watch. Even if the signs of moisture disappears, by themselves... the moisture will not - and will eventually damage your watch - so, visit a professional and remove it permanently. Even waterproof watches are not protected against condensation, so keep that in mind if you plan to go from very hot to very cold temperatures - like from a hot sauna directly to the snow. If condensation occurs, it very rarely (if ever) depends on manufacturing, so if your watch is damaged by moisture, warranty will probably not cover it (it could be manufacturing issues, but... most likely it will be because of the rapid change of temperature = natural causes).

Size This watch has a width of 45 mm (the dial, measured from left to right, with the crown excluded). Even if some watches are not perfectly circle shaped, we still use the term: diameter - and we only measure the case, completely ignoring the crown (even though some includes it, in their measurements).

Titanium case This watch is produced in titanium, which is characterized by being lighter than steel and free from nickel.

Does this watch fit your wrist? Wristwatches has gradually become larger in size, and a typical men's watch is usually between 40 and 45 mm wide. If you have a wrist that is noticeable larger/smaller, we recommend that you focus on the sizes in/outside the outer edges of the typical sizes. You are always welcome to contact our support, so we can share our experience with you.

This product description is created specifically for Watchia.com and may not be copied (in whole or in parts)! Violation will therefore be met by demands of compensation.

Delivery info coming...
Diameter45 mm
Case depth14 mm
Strap typeTitanium
Strap colorSilver
Clasp TypeDeployment clasp
Case materialTitanium
Case colorSilver
Color of dialBlue
Water resistance20 atm (snorkling)
Movement Quartz
Size Guide

How is the size of the watch measured?
The diameter
The common term is diameter, but since not all watches have circular watch cases, the diameter is actually the width measured from left to right. Note that some manufacturers include the crown (to set the clock) and the buttons when measuring the width, but we try to standardize all the watches by not including the crown as part of the measured width.

size info
Case Thickness
The thickness - or height of the watch in profile - is indicated by measuring the watch from top to bottom as illustrated below. By comparison, a 1-euro coin is 2.33 millimeters thick.
One usually defines the watches with these numbers:
Slim: 4-6 millimeter
Normal: 6-12 millimeter
Big: 12-14 millimeter
Oversize: 14-18 millimeter

Tools and maintainance

If you buy this watch together with: Watch sizing tool for metal bands ($24 value) and To change strap/spring bars - ($15 value); tools to easily adjust/replace your bracelet/strap, we will give you a big discount.

We also recommend Cape Cod Polishing Cloth + Buffing Cloth, for removing scratches on metal - or if you just want to make it look new again. If you have scratches on glass, then this is the item for you: Beco Polywatch Lens Polishing Cream 211147.

We found other products you might like!
PRW-6900Y-1ER Casio Pro Trek PRW-6900Y-1ER
Casio Pro Trek PRW-6900Y-1ER
Special Price $715 Regular Price $895
GM-2100SS-1AER Casio G-Shock Street Spirit Limited GM-2100SS-1AER
Casio G-Shock Street Spirit Limited GM-2100SS-1AER
Special Price $438.75 Regular Price $547.50
1792015 Tommy Hilfiger Miles 1792015
Tommy Hilfiger Miles 1792015
Regular Price $272.50
A58861D5I Inex Brown Black A58861D5I
Inex Brown Black A58861D5I
Regular Price $237.50
MF0188G.03 Mini Focus Steel Black MF0188G-3
Mini Focus Steel Black MF0188G-3
Special Price $87.50 Regular Price $110
11577597153MB Oris Big Crown ProPilot X 01 115 7759 7153-Set7 22 01TLC
Oris Big Crown ProPilot X 01 115 7759 7153-Set7 22 01TLC
Special Price $8,555 Regular Price $10,701.25
F20541/3 Festina Chrono Sports F20541/3
Festina Chrono Sports F20541/3
Special Price $272.50 Regular Price $365
S3779/1 Kronaby Diver S3779/1
Kronaby Diver S3779/1
Regular Price $911.25
GM-2100N-2AER Casio G-Shock GM-2100N-2AER
Casio G-Shock GM-2100N-2AER
Special Price $321.25 Regular Price $401.25

We would like to collect cookies

We use traffic log cookies to identify which pages are being used. This helps us analyse data about web page traffic and improve our website in order to tailor it to customer needs. Overall, cookies help us provide you with a better website. Read more in