![Seiko 4T57A Technical Manual & Parts Catalogue Download Page 10](http://html1.mh-extra.com/html/seiko/4t57a/4t57a_technical-manual-and-parts-catalogue_1235310010.webp)
Cal. 4T57A
10/11
TECHNICAL GUIDE
Minute hand
Hour hand
Stopwatch minute hand
(
moves
in minute increments)
Second hand
Stopwatch second hand (moves
in second increments)
Stopwatch 1/10 second hand (moves
in 1/10 second increments)
But ton "A" in stopwatch
function: Start/Stop
First click: Date setting
Second click: Time setting
Crown at normal position
Button "B" in stopwatch function:
Split/Slit release/Reset
* The measurement time indicated by the stopwatch hands that move independently of center hands.
* Stopwatch 1/10 second hand moves for a first minute. After one minute, it indicates the measurement
time when it is stopped.
DISPLAY AND CROWN/BUTTON OPERATION
2. Turn the crown clock-
wise until the previous
day’s date appears.
3. Pull out the crown to
the second click when
the second hand is at
the 12 o’clock position.
It will stop on the spot
and advance the hour
and minute hands by
turning the crown.
(Check that AM/PM is
set correctly.)
* When the crown is at
the second click posi-
tion, do not press any
button. Otherwise, the
chronograph hands
will move.
1. Pull out the crown to
the first click.
4. Push the crown back in
to the normal position in
accordance with a time
signal.
* Do not set the date between 9:00 P.M. and 1:00 A.M.
Otherwise, the day may not change properly. If it is necessary to set the date during that time period,
First change the time to any time outside it, set the date and then reset to the correct time.
TIME SETTING