Hi guys, as much as I love great mechanical watches, I also respect and like the older G-Shock models.
Recently I restored an old Casio G-Shock DW-5600C.
The DW-5600C was released around 1987 and was manufactured to 1996.
During these years the watch was made using two different modules (movements) the 691 (1987-1990) and the 901 (1990-1996). And you can see what module was used on the watch from the number on the case back.
The model I restored was with the 901 module, and I got it from Ebay around 60 $.
When I got the watch it did not have the outer resin, and the strap was in pretty poor condition, but the screen was nice, and not very scratched.
There was some dirt/rust on the sides of the case, and there was a lot of old dirt on the watch.
First thing I did was to use a cloth to clean the sides and front of the watch case, since it did not look to good.
Lucky for me the screen was in good shape but if people want to buff out scratches there is a great thread on that on watchuseek forum.
When I received the watch the module was acting a bit strange and I was getting strange numbers on the screen, so I purchased a new battery CR216, and installed it (the 691 modules use CR2320 batteries).
To remove the case back on these watches you should use special case back tools, or even better get a watchmaker to change the battery if you are not use to these tools. Too many of these case backs have bad scratches because people were removing them with all kinds of tools and the tools were slipping across the case backs.
After replacing the battery the module started working as normal and the numbers were not faded or anything 🙂
I ordered a new bezel for the watch and a new “original ” strap.
Meanwhile I finished cleaning the watch, and it started to look pretty good.
When I received the new bezel, I did not try to remove the four bezel screws the stick out from the sides of the watch, since I have read of MANY people that have tried to remove them and had them break inside the case causing a lot of problems.
Basically I just stretched the bezel over the screws and installed it by that method, and frankly it works very well, and since one does not often remove the bezel its not a problem to install it this way (it does take a few minutes to get it right)
I installed the new strap using the included spring bars, since they looked pretty good, but just for safety I plan to replace them soon.
If you are not sure how to replace straps that are fastened with spring bars you can find plenty of videos on the subject on Youtube.
The final product does look pretty remarkable for a 17+ year old Casio.
*Other things I did that are not a “must do” but are more safe if you want to make sure the watch is water resistant. (old o-rings/gaskets can dry up and crack as the years roll by, and that reduces the water resistance of watches)
-Removed the buttons and lubed the gaskets behind each button.
-Replaced the gasket for the screw back, and lubricated.
The last picture is of two 5600C watches, one with a Casio bezel, and one with an aftermarket bezel.
The Casio bezels are almost impossible to find, they pop up on ebay once in a while but usually cost a bit more than the aftermarket parts.
The watch on the left is using aftermarket parts, and the one on the right uses NOS (new old stock) genuine Casio parts.