Received four junk Casios (DW-5600C / DW-8500 / DW-004X / PRG-240)

Another fun project. Received these four watches from an auction in Japan:

PRG-240-1
DW-8500B-1 Codename
DW-004X-2BT
DW-5600C-9B

I will post updates on these watches in the coming time.