Prospex SPB501J1

The Seiko Prospex SPB501J1 is a rugged yet refined diver’s watch built for serious underwater adventures. Powered by the 6R55 automatic movement, it offers a 72-hour power reserve and reliable accuracy.

The 40mm stainless steel case is paired with a curved sapphire crystal and LumiBrite on the hands, indexes, and bezel for easy reading in low light. With 300m water resistance, magnetic protection, and a secure clasp with slide adjuster, it’s ready for action.

Marked “SPECIAL EDITION” on the case back, it’s a standout piece that blends performance with personality.

Movement

Caliber Number

6R55

Movement Type

Automatic with manual winding

Precision

+25 to -15 seconds per day

Power reserve

Approx. 72 hours(3 days)

Jewels

24

Functions

• Stop second hand function

Case/Band

Case Material

Stainless steel

Case Size

Thickness:13.0mm
Diameter:40.0mm
Lug-to-lug:46.4mm

Crystal

Curved sapphire crystal

Crystal Coating

Anti-reflective coating on inner surface

LumiBrite

LumiBrite on hands, index(es) and bezel

Clasp

Three-fold clasp with secure lock & push button release, solid & slide adjuster

Bracelet Length

196.0

Distance between lugs

20

Other Details

Water Resistance

300m / 1000ft diver's

Magnetic Resistance

4,800 A/m

Weight

174.0

Features

• SPECIAL EDITION on the case back
• Unidirectional rotating bezel
• Screw-down crown
• Three-fold clasp with secure lock
• Screw case back
• In an actual product, the case back direction might be different from the photograph.