Combining classic design with technical innovation, this Longines Master Collection Moon phase Automatic Men\'s Watch is the perfect example of the brand\'s skill and craftmanship. At A Glance  Presented on a stainless steel bracelet with triple safety folding clasp 40mm case size with 30m water resistance Scratch resistant sapphire crystal glass Black dial with moon phase sub dial Roman numeral hour markers Powered by an automatic Swiss movement Power reserve of 64 hours