Bracket Clock, late XVIIth Century, Belgium
Another interesting feature of this clock
is its countwheel strike, rather unusual.

Although this is a later addition from the
19th Century that replaced a round plate
with probably the maker's name, it is none
the less very interesting in its own right.
The hand moves around the 24-hour dial
in perfect synchronisation with the main
dial, while the moon dial behind turns in
the same direction, but not quite at the
same speed. The gearing behind the dial
allows the single hand to indicate the
correct time AS WELL AS the correct
moonphase.

This simple system shows the 2 wheels
that are meshed with a single pinion.
All three are attached to the back of
the dial. The 57-tooth wheel runs the
hand, while the 59-tooth wheel runs the
moon dial behind it. As the pinion has
19 teeth and is geared to the main hour
wheel to make three revolutions per
24-hour period, a simple calculation
verifies the fact that while indicating
the correct hour on the 24-hour dial, the same
hand always indicates the correct moonphase.

View from the rear of dial, where the pinion and
two concentric wheels are clearly visible.
The chain connects the the pinion to added
wheels connected to the main hour wheel
on the front of the movement.

This addition was signed E.O.WEHRLE.