Do I tell my husband the watch he bought me is fake?

For my birthday, my husband gave me, what appears to be, a rather extravagant watch. I'm fairly confident the watch, although a well-crafted fake, is a knock-off. I like the way it looks, but I'm a bit embarred to keep the watch's authenticity (or lack thereof) from my husband. This is so trivial, I know, but I'm not sure what the best course of action is. What do you "Yahoos" think? Thank you, in advance, for your help.