Casio Analog/digital Watch

[porkchop]

I am trying to track down a manual for my Casio watch. The marks on the case read 343 followed by MW-503. The 343 is the model number but would anyone know what MW-503 stands for? The watch is Analog/Digital with Alarm and 200m in water.

[Fitzer]

It doesn't look like they still do a manual for that module (343 was the module number). I found these pointers on watchuseek
Pull the crown out one click. The LCD will blink.
Depending on what was initially displayed in the LCD, you'll do this
1. If day/date are displayed:
Turn clockwise to advance through the settings (year, month, date, language, day of week). Turn counter-clockwise to change the display.

2. If alarm is displayed:
Turn clockwise to advance through the settings (hour, minute, on/off)). Turn counter-clockwise to change the display.

3. If time is displayed:
Turn clockwise to advance through the settings (hour, minute, AM/PM). Turn counter-clockwise to change the display.

[Buenchico]

Although Casio have put many manuals online, yours isn't among them. Your best chance of getting hold of one is probably to contact Casio UK directly. (They might need to dig one out of their archives, scan it to pdf format and then email it to you):
https://support.casio.co.uk/default.aspx

[retrocop]

Do you have a 4 digit number in an oblong box enscribed on the rear of the watch case?

[retrocop]

I know on some makes of watches the ser. no or module no. varies depending in which country the watch was sold.

[porkchop]

The Number is the oblong box reads 343. I understand that most model numbers have 4 digits but mine has just three-- 343. Thank you for information. I tried to get manual on Casio website but for some reason my Module Number 343 is not listed. When you try to contact them regarding a watch you have to tick the number of your watch againgst the list of hundreds of watches but since my number is not in the list i am unable to complete the form. I think that FITZER's information will help me understand how my watch works.

[Buenchico]

Phone [phone] (0900-1700, M-F)