Citizen Eco-Drive
 
CITIZEN WATCH Co. "...in 1976, we created the world’s first light-powered watch. The technology was named Eco-Drive."
 
"Eco-Drive converts any kind of light into energy to power a watch, storing the surplus on a power cell. On a full charge, an Eco-Drive watch runs for months even in darkness with no need for regular battery replacement. It’s designed to charge from ordinary everyday light sources like indoor fluorescent lighting and desk lights. You can go about your everyday life confident that your watch will never stop."
 
Eco Drive watches use natural and artificial light to recharge, with a power reserve in the dark of up to over one and a half years.
 
CITIZEN Promaster Navihawk
GPS Satellite Wave
Eco-Drive Chronograph Watch
Ref. CC9030-51E
 
Citizen GPS Satellite watches refine and surpass radio-controlled technology by adjusting the watches with the signal from a system of satellites orbiting the earth. The precision of the signal is in fact perfect, with a tolerance of one second every ten million years.
 
Dated from 2016, “travel around the world with the newest addition to the Promaster collection” – today, we are offering a pre-owned Citizen Promaster Navihawk GPS Satellite Wave wristwatch, reference CC9030-51E (F900-S104998). It features GPS timekeeping technology with synchronized time adjustment available in 27 cities.
 
It is a quartz watch powered by the Citizen-produced caliber F900 Eco-Drive movement. Date, day, second time zone at a glance. Using the function selector and pushers, you have further access to a battery charge indicator, chronograph, alarm, and second time zone adjuster (world time).
 
Functions:
- Satellite GPS Timekeeping Technology with Worldwide Reception.
- Time Adjustment Available in 27 Cities (40 Time Zones).
- Satellite GPS Timekeeping System with Worldwide Reception Area.
- World's Fastest Timekeeping Signal Reception Speed From GPS Navigation Satellites - As Quick as 3 Seconds
World Time in 27 Cities (40 Time Zones).
- 1/20 Second Chronograph Measures up to 24 Hours.
- Dual Time (Second Time Zone).
- Alarm.
- Universal Coordinated Time (UTC) Display.
- Perpetual Calendar.
- Daylight Savings Time Indicator.
- Power Reserve Indicator.
- Light Level Indicator.
- Day/Date.
 
This watch has for sure one of those busy dials that doesn’t make it hard to read the time. Citizen has a nicely textured face and polished rings around the subdials. The Silver/luminous applied and faceted hour markers are perhaps the most blingy element on the dial, but in a good way since they are visually attractive and very legible.
 
The dial has a green ring around half of the inner dial as well as some additional green accents. The green is subtle and is sort of a signature “GPS color” you have seen in some Citizen GPS watches.
 
It is cased in a 47mm steel Super Titanium (hardened and scratch resistant) case. Citizen's Super Titanium is 40% lighter than stainless steel and 5 times harder to resist scratches. Promaster crown and pilot's rotating slide rule bezel. Sapphire crystal with superior scratch resistance and hardness. Water resistant 200 meters (20Bar/666ft) swimming, showering, and snorkeling.
 
This watch comes on a steel Super Titanium (hardened and scratch resistant) Ctizen bracelet with safety fold over clasp with push buttons. The bracelet will fit a wrist up to 7” (17.8cm).
 
Original Citizen Promaster plastic waterproof clamp down presentation box.
 
About how to use this Citizen Promaster Navihawk GPS watch and its various features, we recommend you carefully read their instruction manuals available online.
 
From A Blog To Watch website – “GPS watches receive signals from global positioning satellite arrays. These constantly beamed signals offer the time and calendar information, as well as location information (time zone). Thus, a modern GPS watch is able to either manually or automatically receive these signals so that the time on your wrist is perfectly accurate. Mechanical watches are accurate to a few seconds a day, while traditional quartz movements are accurate to a few seconds per month. Combine a quartz movement with the ability to update itself with GPS signals, and you are talking about the ability to have perfect accuracy anywhere on the planet assuming you have line-of-sight to the sky.”

Thank you for looking!  Please feel free to contact us with any questions or respectful offers.

Case Markings: 
Citizen Watch Co.
Eco-Drive
SATELLITE WAVE
Global Positioning System
GN-4W-S-6G
F900-S104998
W.R. 20BAR
Japan Mov'T
631021690

Measurements (mm):
Case Diameter 47
Case Diameter w/Crown 51
Case Lug to Lug 53
Case Thickness 15
Lug Width 22
Band Width 22

Vintage watches are traditionally smaller than today's watches. Men’s watches typically measure between 29-36mm wide (some larger, some smaller) excluding the crown. In the listing details we typically try to do our best to list all pertinent dimensions of a watch. If you don't see it, or we failed to do so, please reach out to us. Women’s watches from the 1900s-1970s were also much smaller than today's offerings. Please also feel free to ask any questions you have pertaining to size.
 
We prefer to shoot photographs outside when weather is permitting. However, when we shoot indoors, please be aware that we shoot our photographs inside of lightboxes that are lit with 360 LED bulbs. This indeed magnifies any flaws. Usually, they are much less obvious to the naked eye. Having said that, we never photoshop any of our photography, remove blemishes, etc. We adjust lighting when necessary, but what you see is what you are getting, and we take pride in that.

The condition is pre-owned.
The item may have some signs of cosmetic wear but is fully operational and functions as intended.
Please review the photos and feel free to ask any questions you may have.

It will be carefully packed.

Please view our other listings.
Thank you for looking!

WA-3689