Welcome aboard, young man. You have a beautiful Rolex watch. It is good to see a young gentleman like you, indulging in a brand-name full of positive attributes. You will not go wrong, especially with advice and guidance from this warm and friendly forum.
You are lucky, Singapore is a paradise for new and vintage-watches, especially Rolex, Omega and Patek Philippe.
Study wisely and once you hold a good job, I am sure your collections will grow.
Co-incidentally I was from Singapore too and discover Sydney is a Sahara Desert, when it comes to vintage-watches.
Enjoy the world's greatest and most challenging pastime - vintage-watch hunting and collecting.