Got this DW-6600 for free from a friend of mine, I knew the watch was not operational after getting flooded, but all I needed was a button.
I assumed that some rescue attempts had been made after the flooding, like opening the watch and attempts to dry it out but.........
When I opened the watch the movement and movement holder were rusted as well as rust on various other places in the watch.
The fault was obviously that the gasket was not correctly seated when the watch had been closed after a battery replacement.
Fortunately I did not pay anything for this, but I wanted to share the concequences of water and time on the insides of a G-Shock.
I can use the button, but as far as the watch goes I don't even think that Kung-fusion could save this one