This is the quartz diver 7C43-6010, released by SEIKO in 1985. We believe it was manufactured in November 1992.
This is a rare professional 200m diver, with fewer beads than the 150m diver.
It is a saturation diving model, but as it is approximately 30 years old, its water resistance is currently unknown.
Overall, it is in good condition with few scratches. The crystal has some minor scratches, but is slightly domed, suggesting it is a rare, genuine part from that time.
The case and dial are in good condition considering its age.
The rotating bezel rotates in both directions.
It is in working order, the time can be adjusted using the crown, the date can be advanced by pulling the crown out one notch, it can be hacked, and the crown can be screwed down.
The battery was replaced prior to listing. There were no signs of battery leakage.