The 
Citizen Series 8 870 Mechanical Automatic NA1004-87E is a modern and sporty men's watch known for its high-performance mechanical movement and enhanced magnetic resistance. 
Technical specifications
	- Movement: Caliber 0950 automatic mechanical movement with 24 jewels.
	
		- Features: Self-winding and manual winding capabilities, date display, and hacking function.
 
		- Power Reserve: Approximately 50 hours when fully wound.
 
		- Accuracy: Rated at -5 to +10 seconds per day.
 
		- Frequency: 28,800 vibrations per hour.
 
		- Anti-magnetism: Features enhanced "Type 2 Magnetic Resistance" to protect the movement from the magnetic fields of devices like smartphones and tablets.
 
	
	 
 
	- Case: 40.8mm stainless steel case with grey ion plating.
	
		- Thickness: 10.9mm.
 
		- Bezel: Dynamic two-piece bezel.
 
		- Caseback: Solid stainless steel.
 
	
	 
 
	- Dial: Glossy black dial with luminous hands and index markers.
 
 
	- Glass: Sapphire crystal with an anti-reflective coating to prevent glare.
 
 
	- Bracelet: Stainless steel bracelet with a grey ion plating and a fold-over push-button clasp.
 
 
	- Water Resistance: 10 bar (WR100), suitable for swimming and snorkeling.
 
 
	- Country of Origin: Made in Japan.