It was just the one I needed to use my Casio watch again, the original one was broken with time or worn out, this turns out  to be a very specific item, and it was giving me a hard time to find it, but I have good memories about this watch, and I didn't wanted to give up on it...  so I decided to try in amazon and guess what!... finally found it here. Not much to say about it, this was the correct one, I replaced my self and everything is running just like new with my old Casio watch.