|Grade||Genuine Rolex||3a swiss||swiss||automatic|
|Movement||Rolex Calibre 4130||Genuine Swiss Clone 4130 movement||Swiss 7750 Movement||Asian MingZhu Movement|
|Time Accuracy||-3/+5 sec per day COSC certified||-5/+6 sec per day COSC certified||-10/+10 sec per day COSC certified||-1/+2 min per day COSC certified|
|Stainless Steel Type||904L Stainless Steel||904L Stainless Steel||316L Stainless Steel||316L Stainless Steel|
|Crystal||Sapphire crystal||Sapphire crystal correct date magnification||Sapphire crystal||Mineral Glass|
|Logo & Markings||laser etchings||Exact on entire watch||90% Exact on entire watch||70% Exact on entire watch|
|Dial||Genuine Rolex||Exact detail and font||90% exact detail and font||70% Exact detail and font|
|Luminous Markers||Rolex Lumen||SuperLuminova Swiss Lumen||Swiss Lumen||Normal Lumen|
|Waterproof||100m on standard models||Tested up to 300m||Tested up to 30m||Life waterproof|
|Life expectancy||Lifetime||Lifetime||3-5 years||1-2 years|
|Warranty||2 Years||Up to 5 Years||Up to 3 Years||Up to 1 Years|
|Engine||Rolex Calibre 7750/Mingzhu Engine|
Watch Case: 316L. The raw material of this watch case is 316L, which can be polished, frosted, and can be plated with a variety of materials. It has stable performance and is the best choice for watch cases.
Case Back: Solid. The hard solid bottom cover is not soft or inflexible in any way. It is made of steel, very durable and scratch-resistant.
Crystal: Sapphire Crystal. Sapphire glass has a unique optical material. It is not only dazzling, but also scratch-resistant. The color rendering index (CRI) of the anti-reflective coating is 100, and the brightness is increased by up to 50%. Tips: The A watch is applied with mineral glass instead of sapphire.
Hands: Gold-tone. As for the watch’s hands, it is gold-tone, which looks pretty stunning and high-end.
Second Markers: Minute Markers around the outer rim. The minute mark surrounding the outer edge of the glass is a design element that represents time and is located on the outside of the clock to indicate the time.
Dial Markers: Diamonds. We can use watches with diamonds, because the markings instead of Roman numerals will affect the appearance of the dial.
Luminiscence: Hands and Markers. The luminiscence of the watch is hands and markers. It makes your watch look more funny and functional.
Clasp: Fold Over Clasp. A fold over clasp are used in the watch to make it easier and quicker for the user to open and fold the case over to keep it secure.
Water Resistance: 30 meters. About the watreproof depth of the watch, it is 30 meters. But make sure to close the crown properly. Tips: The A watch is just daily waterproof, need to purchase additional waterproof service which is up to 30 meters.