This Citizen AQ4100-57E features eco-drive technology, a perpetual calendar, and a durable titanium case. It's light on the wrist and comes with a black washi paper dial.

• Condition: Excellent with light wear
• Movement Accuracy: ±5 seconds/year
• Power Reserve: ~1.5 years
• Case Size: 38.3mm

This Citizen watch features atomic timekeeping, an eco-drive solar-powered movement, and a stainless steel bracelet. It includes a perpetual calendar, 200m water resistance, and a beautiful package.

• Condition: Used with light surface wear
• Case Diameter: 42mm
• Movement: Eco-Drive E650 (powered by any light)
• Water Resistance: 200m depth rating

This Citizen Promaster Eco-Drive PMD56-2951 is a Japanese exclusive model featuring titanium construction, solar power, radio sync, and a quick adjust bracelet. It's a lightweight watch with 200m water resistance, perpetual calendar, sapphire crystal, and more.

• Condition: Brand new
• Case size: 39mm diameter
• Thickness: 11.4mm
• Lug width: 20mm

The Citizen AQ4100-57E is a set and forget watch featuring eco-drive technology, perpetual calendar, and pristine finishing. It's made of durable titanium material, which provides excellent comfort on the wrist.

• Condition: excellent
• Movement type: Citizen Cal. A060 High Accuracy Quartz
• Power reserve: ~1.5 years (eco-drive)
• Case size: 38.3mm diameter

This is an incredible daily driver watch, very Grand Seiko adjacent, with the A660 movement accurate to 5 seconds per year.

• Condition: Excellent used condition
• Movement Accuracy: 5 seconds per year
• Case Size: 38mm diameter
• Bracelet Length: enough links for 7.5in wrist

The Citizen AQ4100-57E is a true set and forget watch with its signature eco-drive technology, perpetual calendar, and top-tier pristine finishing. The durable titanium material is light on the wrist, much more comfortable than heavy steel.

• Condition: Excellent
• Movement accuracy: ~±5 seconds/year
• Power reserve: ~1.5 years
• Case size: 38.3mm

Up for sale is my Citizen Perpetual Calendar Eco-Drive Radio Controlled E650-S086710. It has a chronograph function, date at 4 o'clock, day indicator, and other features.

• Condition: Good condition with light signs of use
• Water Resistance: 200M
• Case Diameter: 42mm
• Lug To Lug: 48mm

The Citizen AQ4100-57E, also known as 'Black Frost', is a unique watch that boasts eco-drive technology and perpetual calendar. It features titanium material, making it lightweight and comfortable to wear.

• Condition: Excellent, light wear from careful use
• Material: Super Titanium
• Case size: 38.3mm diameter
• Thickness: 12.2mm