The Seiko SPB103J1 Prospex is a 6R35 caliber watch with an accuracy of +25 to -15 seconds per day, sapphire crystal and 24 jewels.

Movement

Caliber Number
6R35

Movement Type
Automatic with manual winding capacity

Accuracy
+25 to -15 seconds per day

Duration
Approx. 70 hours

Exterior

Case Material
Stainless steel

Crystal
Sapphire crystal

LumiBrite
Lumibrite on hands, indexes and bezel

Clasp
Three-fold clasp with secure lock, push button release with extender

Other Details

Water Resistance
200m / 660ft diver's

Case Size

• Thickness: 12.9 mm
• Diameter: 45 mm
• Length: 52.6 mm

Weight
178 gr

Other Specifications

• Screw case back
• Screw-down crown
• Unidirectional rotating bezel

Other Features

• 24 jewels
• Date display
• Stop second hand function

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