Hello, I recently purchased the Oris Big Crown Pointer date all steel from ShopNBC. I am awaiting Fedex to deliver it and I have one question. I know it has an acrylic crystal on it and I am wondering how durable it is and if I have to do anything special to make it last. I want the watch to last a very long time and want to make sure I dont do anything that could do damage to it. Thanks.