Citizen Quartz Crystron (7100-710158-Y / GN-4W-U) – Vintage Stainless Steel Analog Quartz
Vintage Citizen Crystron with a striking teal/green sunburst dial and 7100 analog quartz movement — classic 1970s styling with reliable grab-and-go accuracy.
This Citizen Crystron is powered by the 7100 analog quartz movement with three-hand time and day-date display. It wears a period-correct 1970s stainless steel case with brushed finishes and a clean, easy-to-read layout. The metallic green sunburst dial shifts from teal to deep emerald depending on the light, giving it plenty of vintage character.
Condition
Overall: Good vintage condition with normal wear from use and age. Fully running at time of testing.
Case & bezel: Stainless steel case shows light to moderate scratches, small nicks, and general surface wear consistent with a late-70s watch. No major dents, cracks, or structural damage.
Crystal: Crystal shows light marks and hairlines under reflection but is clear in normal viewing. No large chips or cracks noted.
Dial & hands: Original green sunburst Crystron dial is clean with strong color and even finish. Printing (“Citizen Quartz,” “Crystron,” logos, and dial text) is intact. Hands and indices are bright with minor age only; day-date display is crisp and changes correctly.
Case back: Screwback stamped “GN-4W-U” with standard wear and tool marks from past battery changes. All text readable.
Strap & buckle: Aftermarket black leather strap with standard pin buckle. Strap shows light creasing from use but no cracking or damage; comfortable and ready to wear.
Function: Quartz movement is running and keeping time. Crown sets time and date properly. Battery age unknown — a fresh cell is recommended as routine service.
- Not included: box, manuals, or additional accessories.
Features
Vintage Citizen Crystron analog quartz
Movement: Cal. 7100 quartz, 3-hand with day-date at 3 o’clock
Dial: Teal/green metallic sunburst dial with applied indices and framed day-date window
Dial code: “Japan 7100-710158-Y” printed at 6 o’clock
Case back: Stainless steel screwback marked GN-4W-U
Case: Classic late-70s stainless case (mid-30 mm range) with polished and brushed surfaces
Crystal: Mineral crystal
Strap: Black leather strap with pin buckle (aftermarket, standard length)
Style: Versatile vintage look that works with casual or smart-casual outfits.
“70s Citizen design, a popping green sunburst dial, and quartz reliability — an easy vintage piece you’ll actually wear.”
Frequently Asked Questions
Q: Is this an authentic Citizen Crystron?
A: Yes. The case, dial, and movement are original Citizen components, with the correct 7100-710158-Y dial code and GN-4W-U case-back markings for this Crystron.
Q: Is the leather strap original?
A: No. The original bracelet/strap has been replaced with a modern black leather band for comfortable daily wear.
Q: How accurate is it?
A: The 7100 quartz movement was designed for very good accuracy compared with mechanical watches. As with any vintage quartz, actual performance depends on battery freshness and service history.
Q: Is it water resistant?
A: It was built as a water-resistant everyday watch, but due to its age we do not guarantee water resistance. Treat it as not water-resistant unless it passes a modern pressure test.
Q: Does it need servicing?
A: The watch is running and functional, but for regular use we recommend a fresh battery and a quick check of gaskets and seals.
