The first ever Seiko 5 watch, Seiko Sportmatic 5, was born in 1963. It was Seiko’s and Japan’s first ever automatic day-date watch. ‘’5’’ represented the promise that every Seiko 5 watch would have five key attributes.
Automatic movement, Day-date display at the three o’clock position, Water resistance, Recessed crown at the four o’clock position and a Case and bracelet built for durability.
Taken together and in combination with the then new mainspring and shock resistance system, these features gave Seiko 5 its distinctive appearance and its strength.