Seiko Prospex Alpinist GMT Blue Watch 39.5mm SPB377J1

The movement is automatic with manual winding capability with caliber 6R54 with approximately 72h of battery life and an accuracy of +25 to -15 seconds per day and 24 jewels. The watch functions are hours, minutes and seconds with a 24-hour hand and a stop-seconds function.

The case is made of stainless steel with a super hardened coating of 39.5mm and a thickness of 13.6mm. The crown and caseback are screwed down and the caseback is transparent.

The blue dial is protected with curved sapphire crystal with anti-reflective coating on the internal surface. The indexes are silver and the hands have reflective material.

The calendar is between 4 and 5 o'clock.

The strap is made of calfskin with a blue folding clasp.

Is 200m submersible (20ATM).