Dear all
I am a new member.
I am from Portugal. Recently I hear about young people are using the old digital watch.
So I went to my old things and I found my old digital watch, the Casio M-521 407.
I change the battery but it don?t works.
From yesterday stays with new battery but “sleeping”. This morning is working! Now I am using it but sometimes goes down, i press the light button and it turns on again.
Seems some electronic thing isn?t good. Yesterday I cleaned everything.

If some body can add information about this clock (year), please leave a reply.
I have donne a google search and i only found in the ebay one and the price quite curiouses, about 900$...

Best regards

Carlos Palha