No manual I cannot set the clock, and no directions come with it. Is there a clock? I push the button "clock" and the digits flash 12: 01but nothing changes the numbers.

There are many models of Centrios brand alarms.

Here is some advice found on the web
1:
All buttons are on the back of the clock. To set the time zone, push "menu"; then push "Set" until the correct time zone is displayed (EA = Eastern, PA = Pacific, etc); then push "Menu" again - DONE. To adjust time, date, year & day, push & hold "Set" until the hour begins to flash; then push "Adjust" until the correct hour is reached; then push "Set"; repeat this sequence as the clock moves on to the next flashing segment (e.g. minute, seconds, month, date, & year); the clock will automatically set the Day based upon the Month, Day & Year you select - DONE.
2:
Press theSETkey to enter the mode"Manual Time Setting".
Manual Time Setting
In case the Skyscan Atomic Clock is not able to detect the WWVB-signal (disturbances, transmitting distance, etc.), the time can be manually set. The clock will then work as a normal Quartz clock.
Note:
In 12 hours mode the time will be displayed with an additional"PM"for the time from 12:00 noon until 11:59.
1. The hour digits will start flashing on LCD1. Set the desired hours by pressing the+key followed by pressing theSETkey.
2. Now the minute digits will start flashing. Set the desired minutes by pressing the+key . If the + key is held, the units will increase by 5.
3. Press theSETkey to move to the"Year Setting".

To set the clock
1. Turn the key to "ON".
2. Push the "SELECT" button and
"RESET" button together for at
least two seconds.
3. When the hour digits start flashing,
push the "RESET" button to set the
hours.
4. Push the "SELECT" button, and
the minute digits will start flashing.
5. Push the "RESET" button to set
the minutes.
6. Push the "SELECT" button and
then release it to start the clock.

I have one & I just set it. You hold down the s button until the time flashes then use the arrow buttons to set hour then push the s again to set minutes & when they flash you push the arrow button again then repeat with the alarm & date.
Tina:)

With the key on.......

1) Push the select button and reset button together for at least two seconds.
2) When the hour digits start flashing push the reset button to set the hours.
3) Push the select button and the minute digits will start flashing.
4) Push the reset button to set the minutes
5) Push the select button and release it to start the clock.

TIME: Depress the time button and hold until digits flash. Push the right arrow until the time shows the correct time.
DATE: Depress the date button and hold until date flashes. Push the right arrow until the digita display the correct date.

You can download the manual below:

http://www.timexaudio.com/pdf/T311IB57574_35.pdf

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G'Day Dutchgbg

Here is a quick guide to set the clock

1: Push the "select" button and the "reset" button together for at least two secounds.

2: When the hour digits start flashing, push the "reset" button to set the hours

3:Push the "select" button to fix the hours, and the minute digits will start flashing.

4: Push the "reset" button to set the minutes

5: Push the "select" button to fix the minutes, and then release it to start the clock.
regards robotek

Select the clock (push the "select" button for at least 2 seconds).
Push both the "select" and "reset" buttons for at least two seconds.
When the "hours" digits begin flashing, push the "reset" button to set hours.
Push the "select" button, and the "minutes" digits will begin flashing; push the "reset" button to set minutes.
Push the "select" button to start the clock.

There are three buttons, let's call them 1, 2, and 3, from left to right.


Clock
Time setting

A. 12 AM, PM or 24.00 h
With the clock in the time readout mode, keep
button (2) depressed for 4 seconds -12 AM, PM
or 24.00 flashing. After pushing button (1), either
a 12-hour (AM + PM) or a 24-hour setting
program can be selected. If you only want to
change the display mode, push button (3). The
clock then returns to its normal timekeeping
function.

B. Hours
Push button (2) a second time - hour display
flashes. Set hour by pushing button (1). After
pushing button (3)*, the clock returns to the time
readout mode with new hour setting.

C. Minutes
Push button (2) once more - minute display
flashes. Set minute by pushing button (1). Upon
pushing button (3)*, the clock is started -
accurate to within 1 second.

Stop watch function
The stop watch can only be set in motion if the
clock is in its normal timekeeping mode and not
during setting operations.
A. Push button (3) - 00:00 display appears;
B. Push button (1) - stop watch is on;
C. Push button (1) a second time - watch stops.
(Additional times can be added by pushing button
(1) again - stop watch keeps running. Push button
(1) once more to stop timing.)
D. Push button (2) - 00:00 display appears;
E. Push button (3) - normal timekeeping mode.

If button (3) is pushed during operation A and
B, the setting procedure must be restarted
(push button (2)).

hi , I hope this help you out. the digital clock of your porsche 944 late 85 is a chronometer also.
this digital clock has three buttons, lets call them A,B,C from left to Right.
to set the time press the B Button for 5 seconds. the digits should be flashing by that time.
It will show you the option of 12H or 24h Mode, press the A button to select what you want, after push the B button to select the Hours it should be blinking Press the A button to select your time. repeat step to set the minutes.when your done Push the C button.

By now your digital clock would be set. the chronometer is the C button. to switch between clock and chronometer push C button, if you select chronometer. the A button start and stop, the B button Reset. Good Luck

to set the 5 main presets:
with radio on, use the manual tuner to find station you want on a preset. push and release mem/clock adj button (mem will flash on display), push preset number and while holding it in push the mem/clock adj button again (mem on display will go away). station is now preset to that number.

to set the 5 additional presets:
with radio on, use the manual tuner to find station you want on a preset. push and release the +5 button (+5 will flash on display), push and release mem/clock adj button (mem will also flash on display), push preset number and while holding it in push the mem/clock adj button again (mem on display will go away). station is now preset to that +5 number.

to set the digital clock display:
with radio off, push and release the mem/clock adj button (clock display will now flash), use the tun up / hr part of manual tuning button to adjust hour and the tun dn / min part to adjust minutes.