Just wanted to share pics of my newly-restored DW5600C screw-back! (691 module, Japan H factory) Found this watch sitting in a thrift store with a crumbled bezel and covered in grime for $4. Amazingly all functions including the light still work and all the bezel screws are intact, and this watch is at least 26 years old! I cleaned it up and just got in a new aftermarket bezel and band (buckle is original Casio Japan.) Here it is on the wrist:
I learned a lot about restoring this watch and sourcing a replacement bezel from searching old threads on this subforum, so also thanks to anyone who has ever posted about restoring these. I have wanted one of these for a while, ever since I saw pics of a screw-back 5600 for the first time from forum member cbrmike:
Thanks for looking!