Eberhard Tazio Nuvolari Grand Prix TN, Руководство пользователя

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PUSHBUTTONS
Make sure pushbuttons are always pressed in following order:
A
:
start
A
: stop
B
: return to zero
Abide by this sequence quite severely so as to preclude damage to the mechanism.
Don’t activate the pushbuttons under water since they are not watertight while being pressed.
OPERATING INSTRUCTIONS FOR THE CHRONOGRAPH
Press pushbutton
A
to start the chronograph. Press it again to stop it. This will make it possible to read
the counters (seconds, minutes and hours elapsed). Press pushbutton A again and the chronograph will
function again after the intermediate stop. To reset to zero, the chronograph must be in the stop position
and, by pressing the second push button B , all the hands will return to zero. You are recommended not
to have the chronograph mechanism running constantly.
TACHOMETER SCALE - TACHOMETER SCALE IN KM/HOUR - BASIS 1000 M - ON THE
DIAL
The outer rim on the dial shows the data needed for metering the speed of a vehicle over a distance of
1,000 metres. The moment the vehicle passes the first reading mark, the beginning of said 1,000 m
distance, activate the hand
F
of the chronograph to start it and press again to bring it to a stop at the
moment the vehicle passes the second reading mark. Said hand
F
will now indicate the average speed
reached in km/h in tune with the tachometer scale. Example: when one kilometre is covered within 45
seconds, the average speed displayed by the centre second-hand F on the tachometer scale will be
tantamount to a speed of 80 km/h.
TACHOMETER SCALE IN MILES/HOUR - BASIS 1000 M - ON THE BEZEL
To measure the speed in miles proceed as explained above for the km/hour, but read the speed in miles
on the engraved scale on the bezel of the watch case. Example: if one kilometre is covered in 45 seconds,
the average speed indicated by the centre second hand of the chronograph on the tachometer scale is
49.7 miles per hour.