The emblematic Seiko "Alpinist" collection includes a new GMT SPB377J1 model, while retaining its inimitable chic and vintage design. This automatic watch features the 6R54 movement with GMT function. Its scratch-resistant stainless steel dial is accompanied by a curved anti-reflective sapphire crystal. Its magnificent blue dial features a bidirectional internal bezel with cardinal points and Lumibrite-coated hands and hour markers. This Prospex watch is water-resistant to 20 bar and comes on a blue leather strap that perfectly matches the colour of the dial.

MOVEMENT
- Caliber: 6R54
- Waterproofing: 20 bar
- Functions: GMT hand
- Jewels: 24
- Frequency: 21600
- Power reserve: 72 hours
- Precision: +25 / -15 sec. / day
- Movement: Automatic

DIAL / INDEX / HANDS
- Index Specification: lumiBrite
- Watch hand Specification: lumibrite

CASE / BEZEL / GLASS
- Housing Material: Stainless steel, anti-scratch coating
- Bezel Material: Stainless steel, Stainless steel
- Glass Material: Sapphire
- Bezel Specifications: Fixed by screws
- Case back Specificity: Transparent, screwed
- Glass Specificity: Anti-reflective treatment, Bomb
- Crown Specification: Screwed
- Box opening: 39.45 mm
- thickness: 13.55 mm
- Lug-width: 20

BRACELET
- Strap Material: Leather
- Strap Color: Dark blue
- Buckle/clasp: Push button deployant