Often referred to as “self-winding”, automatic movements harness energy through the natural motion of the wearer’s wrist. Watches with automatic movements are very popular because the wearer doesn’t have to worry about winding the watch daily to ensure constant operation. As long as the watch is worn regularly, it will maintain power without requiring winding.
Seiko introduced the Sportsmatic 5 in 1963. This new line of watches set a new standard in accessibly priced mechanical watches. The Seiko Sportsmatic 5 was named for the five key features present in every watch of this type: (1) the Diaflex, Seiko’s unbreakable mainspring, (2) the Diashock shock resistant design, (3) 3 bar water resistance, (4) day and date display in a single window, (5) an automatic movement. Its uniqueness was evident also in the case design, with the crown hidden behind the 4 o’clock position. The Seiko 5 series has now been in production for over 50 years.