Eloga Triple Date Calendar hand wind gents watch 1950s. Very rare triple date configuration consisting of a rotating outer ring with the date which is set against the day via the separate crown at 10 o'clock. Pushing in the crown then operates the month display. Neither of these advance with the movement of the watch but by setting the right day against the day, the advancing day pointer hand then indicates the correct day, date and month. A simple alternative to a more complex mechanical calendar month.