My Eastern Watch Collection: Citizen Promaster Marine BN0220-16E Eco-Drive Diver Super Titanium 200 meters (similar to BN0227-09L & BN0228-06W) - A Unique Designed Beater Watch, A Review (plus Video)
48mm Titanium 1990 Citizen 5503 Pro Diver 800 Meters Day Date Japan Watch Beast! | eBay
citizen 5503 300m 800m 1300m Automatic conversion? | The Watch Site