|gold and black||Case size||40MM|
|Strap Width||20 mm|
|Glass Material||Sapphire glass|
|Case Material||STAINLESS STEEL|
|Band Material||STAINLESS STEEL|
|Battery life||2 Years|
The oyster watch case has the least function is waterproof. There is a double waterproofing system in the watch crown.
Usually, people focus on the waterproof in watch dial or the watch case back but ignore about the waterproof in watch crown, which is an important part in watch waterproof.