This is a Bulova automatic with a so called open heart. This watch has a sapphire glass on te front. The dial has an opening so you can see the balance wheel moving. The back also has a (mineral) glass on it so you can see the automatic movement. The watch has a power reserve of 60 hours when fully wound. The size of the watch is diameter 41mm and thickness 13mm.It is waterproof till 100 Mtr (10 ATM) The watch is new. You will recieve 2 years guarantee on it.