Casio Watch 587 590 593 Module No 596 1271 (Display stand & Box ) CHRONOGRAPH | #425687943
Found out what some of the solder points on the module 593 are for. Those three that are marked are for timing adjust based on that table. This picture is from a
Vintage Casio a158w module 593 digital watch montre uhr classic digital watch | eBay
VINTAGE CASIO DIGITAL LCD WATCH F99-W MODULE 593 | #511749645
Casio F-91 User Manual / Module 593
RARE VINTAGE 1987 Casio F-88W Digital Watch Module 593 with New Battery - $12.00 | PicClick
I keep going back to the Casio 593 (F-91W and A158)