Timing up to 1/5 second. 

Timing up to 30 minutes. 

Timing up to 12 hours.

 Special calibration for yachting (X). 

Dial showing "solunar periods" (Y). 

The minute-recorder dial of this chronograph is divided into 6 sectors, each representing 5 minutes, and is specially designed to yachtsmen. In yacht racing a gun signal gives warning that in five minutes' time another gun signal will start the race. Thus the yachtsman is able to maneuver his yacht so that he crosses the starting line on the second signal. This small dial thus shows at a glance how much time remains before the starting signal. 

This chronograph shows the "solunar periods" as well as the official time. These periods, which are marked on the small dial Y, show the daily tidal times for a given port or latitude. This lunar dial is fitted with a rotating disc divided into 4 coloured sectors. The two opposite blue sectors represent high tide, while the two yellow ones represent low tide. As tidal times differ from place to place, a pusher Z is fitted for setting the coloured sectors accordingly. 

Lunar time is also used by anglers, hunters and naturalists who are familiar with the "solunar theory", for which tables have been published since 1930 by Mr. J. Alden Knight. These give a daily forecast of the feeding-times of fish and game, or in other words, the most favourable times for fishing and hunting. 

According to the scale of the chronograph shown opposite the tide will be its lowest around 6 a.m. and 6:30 p.m. that day.

X = Yachting dial

Y = "Solunar period" dial

Z = Pusher for setting lunar time