|Grade||Genuine Richard Mille||3a swis||swiss|
|Time Accuracy||-3/+5 sec per day COSC certified||-5/+6 sec per day COSC certified||-10/+10 sec per day COSC certified|
|Stainless Steel Type||904L Stainless Steel||904L Stainless Steel||316L Stainless Steel|
|Crystal||Sapphire crystal||Sapphire crystal||Sapphire crystal|
|Logo & Markings||laser etchings||Exact on entire watch||95% Exact on entire watch|
|Dial||Genuine Richard Mille||Exact detail and font||95% exact detail and font|
|Waterproof||50m on standard models||Tested up to 300m||Tested up to 30m|
|Life expectancy||Lifetime||Lifetime||3-5 years|
|Warranty||2 Years||Up to 5 Years||Up to 3 Years|
|Case Size||Around 50*40mm|
|Dial Color||Transparent Dial|
Case Back: Transparent. Patek Philippe usually uses a transparent back, which is more waterproof than a through-bottom one.
Crystal: Sapphire Crystal. Sapphire crystal is a good choice, because sapphire has higher impact resistance, air tightness and hardness than other materials, and the processing cost is also high, so it is mostly used in top watch brands. Tips: The A watch is applied with mineral glass instead of sapphire.
Hand: Silver-tone. As for the watch’s hands, it is silver-tone, which is delicated and cool.
Second Markers: Minute Markers around the outer rim. The second hand of the watch is designed as shown in the picture above, with minute markers on the outer edge, as shown in the picture above.
Dial Markers: Dot. These dots in the watch are used as dial markers instead of usual Roman numerals to indicate the time.