Here is an Omega Seamaster Automatic Calendar watch. This automatic calendar watch is the last generation of the "Seamaster Calendar" model with the design of beefy lugs. The 24 jewels movement is an Omega calibre 562 with a swan neck regulator. It has been fully serviced and running accurately. The movement serial number is 18609645, dating this watch to 1961. Factory original dial is in great condition—original signed crown. Crystal is brand new—brand new 18mm matching high-quality genuine leather strap. The solid stainless steel original case measures 34.6mm, excluding the crown by 42mm lug tip to lug tip. Case model 166.009. The calendar feature is working accurately. The wrist size in the photo is 6 inches.


  • Circa: 1961

    Model: Seamaster

    Caliber: 562

    Movement serial #: 18609645

    Jewel count: 24 jewels

    Movement Type: automatic wind

    Case model: 166.009

    Case material: Solid stainless steel

    Case gasket: O-Ring rubber gasket 

    Crystal: Acrylic New crystal

    Crown: Signed

    Case Diameter excluding crown: 34.6mm

    Case length lug tip to lug tip: 42mm

    Dial: Factory original finish

    Hand type: Dauphine (original)

    Strap material: genuine leather

    Strap width between lugs: 18mm

    Wrist size in photo: 6 inches