I really like the 1545 module used in older G-Shock squares. The one issue with them is display clarity, due to the darker gray and grainy background. Was a model ever produced with a higher clarity 1545 display? Maybe a special edition with a Japan caseback? I'd like to get one and do a module swap in one of my screwback reissues.
Here is an example showing a standard clarity display 1289 module, next to a higher clarity display 1289 module from a DW-6900 stamped "Japan M". I'm after the same thing in a 1545 module.