Additional Information

Manufacturer	Casio
Model Number	EF550PB-1AV
Gender	Mens
Display	Analog Analog An Analog refers to the type of dial. Typically an analog watch has an Hour, Minute and Second Hand markers.
Movement	Quartz Quartz A quartz movement, usually the most accurate type of movement, uses a battery for its power source.
Crystal	Mineral Mineral Hardened crystal or glass that gives a protective barrier. There are multiple variations but most are scratch resistant and durable.
Case Material	Stainless steel Stainless steel Stainless steel is a heavy, durable metal that is moderately scratch resistant. Brushed Silver is the most common color, though the metal can be plated for different colors.
Case Color	Black
Case Diameter	45mm Case Diameter The full width of the watch case, all the way across from left to right. General sizing: < 20mm: A small, women's sized watch. 21mm - 30mm: A women's or small unisex sized watch. 31mm - 40mm: A large women's or unized sized watch. < 40mm: A large men's or unisex sized watch.
Case Thickness	12mm
Band Width	45mm
Band Color	Black
Band Type	Resin Strap
Dial Color	Black
Warranty	One-year
Water Resistance	100m Water Resistance 100m water resistance means this watch is suitable for shallow diving and swimming, and should not be damaged by use in water.

• 100M Water Resistant
• Retrograde 1/20 second chronograph
• Measuring capacity: 59:59’59”
• Measuring mode: Elapsed time
• 12/24 Hour Formats
• Tachymeter
• Date Display
• Mineral Glass
• Screw Lock Crown
• Screw Lock Back
• Resin Band
• Stainless Steel IP Case
• Stainless Steel IP Bezel
• Accuracy: +/- 20 seconds per month
• Battery: SR927W
• Approx. battery life: 2 years
• Module: 5147

Casio watches are well known for the wide variety and innovation of its wristwatches. It was one of the earliest manufacturers of quartz crystal watches, both digital and analog. Casio was one of the first manufacturers of watches that could display the time in many different time zones and of watches with temperature, atmospheric-pressure, altitude, and even GPS position displays.