Seamaster 300 Date

The Seamaster 300 reference 166.024 adds a date to Omega's broad-cased 1960s diving watch. It retains the black face, luminous hands, rotating minute ring and curved steel strap attachments of the no-date version. The small opening at three is the main interruption to that layout.

Omega lists this reference in its 1966 international collection with calibre 565, an automatic movement. Worn on the wrist, the movement winds its spring through a rotating weight inside the case. The calendar adds a second everyday use to a watch whose outer scale was designed for timing a dive.

From the side, the case shows the same curved surfaces and protected crown as the no-date Seamaster. The acrylic cover rises above the black face. Large luminous shapes remain the main features beneath it, although the date window removes the hour marker at three, breaking the otherwise repeated pattern around the dial.

This reference also has a later manufacturing history. WatchCo, an Australian business, assembled Seamaster 300s using genuine Omega service components and older movements. A documented example can therefore have a freshly made case, dial and hands around a mechanism from an earlier period. It is a later assembly of genuine components, not a complete factory watch from the 1960s.

That distinction explains why two 166.024s can look so far apart in age. One may preserve a period face; another may show the same design through later replacement parts. The calendar identifies this branch of the Seamaster 300. The reference by itself cannot tell the rest of the object's history.