Citizen Automatic Open Heart watch, steel, NH9131-14E

Citizen Automatic watch with a silver-colored steel case, black Open Heart dial and visible movement

The Citizen NH9131-14E is an automatic watch with a round opening in the lower part of the black dial, through which the movement can be seen. The wave pattern on the dial, the rose gold-colored pointed hour markers and hands, and the silver-colored steel case give the watch a classic look. The stainless steel case is 40 mm wide and 11 mm thick, and the watch weighs 68 g. The movement is a mechanical caliber 8229 with a power reserve of 40 hours. The case back is open.

The black strap is textured and 20 mm wide. It fits a 150–210 mm wrist. A mineral crystal protects the dial. The hands are not luminous. Water resistance is 50 m / 5 atm, so the watch withstands sweat, splashes and rain. According to the product information, swimming is not recommended. The name Citizen was originally suggested by Shinpei Goto, the mayor of Tokyo.

Product number: NH9131-14E
Brand: Citizen
Category: Men's watches
Movement: Automatic
Caliber: 8229
Power reserve: 40 hours
Crystal: Mineral crystal
Case material: Stainless steel
Case color: Silver/gray
Case width: 40 mm
Case thickness: 11 mm
Shape: Round
Dial color: Black
Strap color: Black
Strap length (wrist circumference): 150–210 mm
Strap width (lug width): 20 mm
Water resistance: 50 m / 5 atm
Luminescence: No
Weight: 68 g

Frequently asked questions

What kind of movement does the watch have?
The watch has a mechanical automatic movement, caliber 8229. Its power reserve is 40 hours.

What does water resistance of 50 m / 5 atm mean in use?
The watch withstands sweat, splashes and rain. According to the product information, swimming is not recommended, and the watch is not suitable for snorkeling or diving.

Does the watch suit a slim wrist?
The case width is 40 mm and the thickness is 11 mm. The strap fits a 150–210 mm wrist.