Seiko Prospex Alpinist SPB503
Inspired by Seiko’s first sports watch from 1959, this new Prospex Alpinist model blends enduring mountaineering heritage with modern watchmaking technology. The archival teal-turquoise dial recalls tones found in early Seiko field watches, while signature Arabic numerals, wedge-shaped indices, and stylized LumiBrite hands deliver both clarity and vintage presence.
Designed for exploration, the watch features a rotating inner compass bezel, a magnified date window, and the classic Alpinist logo displayed prominently on the dial. The stainless steel case and bracelet are reinforced with a super-hard coating for enhanced durability, complemented by a sapphire crystal with inner anti-reflective coating for optimal visibility in harsh environments.
Equipped with the modern Caliber 6R55 automatic movement, this Alpinist offers a 72-hour power reserve, manual winding capability, a screwdown crown, and 200-meter water resistance. A transparent screwdown caseback reveals the movement and displays the iconic Alpinist mountain emblem, while the tri-fold push-button clasp ensures secure comfort on the wrist.
Technical Data
- Model: SPB503
- Movement: Automatic
- Caliber: 6R55
- Vibrations: 21,600 per hour
- Jewels: 24
- Power Reserve: Approximately 72 hours
- Case Material: Stainless steel with super-hard coating
- Case Diameter: 39.5 mm
- Case Thickness: 12.7 mm
- Lug-to-Lug: 46.4 mm
- Crystal: Sapphire crystal with anti-reflective inner coating
- Dial Color: Turquoise
- Strap: Stainless steel bracelet with super-hard coating
- Clasp: Tri-fold clasp with push button release
- Lug Width: 20 mm
- Water Resistance: 20 bar / 200 m / 660 ft
- Additional Features: Transparent screwdown caseback with Alpinist mountain symbol
- Crown: Screwdown
Features
- Rotating inner compass bezel
- Magnified date calendar
- Automatic with manual winding capability
- LumiBrite hands and markers
- Alpinist logo on the dial
- Super-hard-coated case and bracelet
- Screwdown crown and screwdown exhibition caseback
- Heritage-inspired teal dial tone
- Durable, exploration-ready design
Seiko Prospex Alpinist SPB503
Seiko Prospex Alpinist SPB503
Inspired by Seiko’s first sports watch from 1959, this new Prospex Alpinist model blends enduring mountaineering heritage with modern watchmaking technology. The archival teal-turquoise dial recalls tones found in early Seiko field watches, while signature Arabic numerals, wedge-shaped indices, and stylized LumiBrite hands deliver both clarity and vintage presence.
Designed for exploration, the watch features a rotating inner compass bezel, a magnified date window, and the classic Alpinist logo displayed prominently on the dial. The stainless steel case and bracelet are reinforced with a super-hard coating for enhanced durability, complemented by a sapphire crystal with inner anti-reflective coating for optimal visibility in harsh environments.
Equipped with the modern Caliber 6R55 automatic movement, this Alpinist offers a 72-hour power reserve, manual winding capability, a screwdown crown, and 200-meter water resistance. A transparent screwdown caseback reveals the movement and displays the iconic Alpinist mountain emblem, while the tri-fold push-button clasp ensures secure comfort on the wrist.
Technical Data
- Model: SPB503
- Movement: Automatic
- Caliber: 6R55
- Vibrations: 21,600 per hour
- Jewels: 24
- Power Reserve: Approximately 72 hours
- Case Material: Stainless steel with super-hard coating
- Case Diameter: 39.5 mm
- Case Thickness: 12.7 mm
- Lug-to-Lug: 46.4 mm
- Crystal: Sapphire crystal with anti-reflective inner coating
- Dial Color: Turquoise
- Strap: Stainless steel bracelet with super-hard coating
- Clasp: Tri-fold clasp with push button release
- Lug Width: 20 mm
- Water Resistance: 20 bar / 200 m / 660 ft
- Additional Features: Transparent screwdown caseback with Alpinist mountain symbol
- Crown: Screwdown
Features
- Rotating inner compass bezel
- Magnified date calendar
- Automatic with manual winding capability
- LumiBrite hands and markers
- Alpinist logo on the dial
- Super-hard-coated case and bracelet
- Screwdown crown and screwdown exhibition caseback
- Heritage-inspired teal dial tone
- Durable, exploration-ready design
Availability: Out of STOCK
Authorized Retailer
Specifications
Specifications
Return Policy
Return Policy
Exchange only within 10 days of purchase
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What Our Clients Say About Us
I can’t say enough wonderful things about my experience, especially thanks to Sterling at Dejaun Jewelers. I had been searching everywhere for the limited-stock Seiko “Pepsi” SSK047 — it was sold out almost instantly and nearly impossible to find. This watch was a gift for a close friend who never asks for much, and this was the one thing he truly wanted. I was determined to find it for him. When I reached out, Sterling immediately reassured me that they had a few in stock. His communication was warm, clear, and incredibly patient as he confirmed everything I needed to know. He understood how meaningful this gift was, and within just a few hours of placing the order, he surprised me by sending the UPS tracking number. That level of responsiveness and care is rare these days. Sterling turned what could’ve been a stressful search into a smooth, heartwarming experience. Thanks to him, I was able to secure a special, hard-to-find watch for someone who truly deserves it. I’m deeply grateful and highly recommend this team. If you’re looking for honesty, commitment, and exceptional service, Dejaun Jewelers is the place.
I had an amazing experience purchasing our rings here, and I want to give a special shout-out to Sterling. From the very beginning, he made the entire process smooth, stress-free, and enjoyable. He was incredibly patient, knowledgeable, and responsive to every question I had — even sending updates along the way so I always knew what was happening with the order. When the ring arrived, he shipped it immediately and followed up with tracking information right away. It’s rare to find someone who genuinely cares about customer satisfaction the way Sterling does. His professionalism and kindness made us feel taken care of throughout the whole process. If you’re looking for great quality jewelry and outstanding service, especially with someone who will go above and beyond for you, ask for Sterling. Highly recommend