Seiko Classic SUR Quartz Watches

• Movement: Quartz
• Engine: Seiko Caliber 6N42
• Case size: 39 mm
• Case thickness: 7.1 mm
• Case material: Stainless steel
• Caseback: Solid
• Crystal: Scratch-resistant sapphire
• Bezel: Fixed, stainless steel
• Date display
• Crown: Pull / push
• Band: Stainless steel bracelet or leather strap
• Band width: 21 mm
• Clasp: Fold-over with double push-button release
• Water resistance: 50 m (165 ft)

Model 303

• Case size: 37.4 mm
• Case thickness: 8.2 mm
• Leather band with tang clasp

Models 305/306

• Case size: 39 mm
• Case thickness: 8.1 mm
• Leather band with tang clasp

Models 307/309P1/311P1

• Case size:  40.2 mm
• Case thickness: 8.4 mm

Model 317P1

• Case size: 35.4 mm
• Case thickness: 8.2 mm

Model 319P1

• Case size: 35.7 mm
• Case thickness: 8 mm

Models 323/325

• Seiko Caliber 6N76 quartz movement 
• Carbon fiber style dial 
• Luminous hands and hour markers
• Case size: 41 mm
• Case thickness: 11.5 mm
• Lug width: 21.5 mm
• Big date window at 6 o’clock
• Hardlex crystal
• Textile weave rubber backed strap. 
• Water resistance: 100 m (330 ft)