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Ref. SPB505J1
The Seiko Alpinist SPB505 is a modern interpretation of the legendary mountaineering watch, featuring a 39.5mm case, 6R55 automatic movement, and 100m water resistance. It combines vintage aesthetics with contemporary specifications.
Diameter
39.5mm
Thickness
12.7mm
Lug to Lug
47mm
Lug Width
20mm
Case Material
Stainless Steel
Water Resistance
200m
Crystal
Sapphire Crystal
Bezel Material
Aluminum
Bezel Type
rotating
Movement Type
Automatic
Caliber
6R55
Dial Color
black
Numerals
Indices
Bracelet/Strap
Stainless Steel
Clasp Type
Hidden Fold Clasp
Clasp Material
Stainless Steel
BRAND
SeikoREFERENCE
SPB505J1COLLECTION
Prospex AlpinistNICKNAME
“Modern Alpinist”MOVEMENT
AutomaticCALIBER
6R55CASE MATERIAL
Stainless SteelCRYSTAL
Sapphire CrystalWATER RESISTANCE
200m (snorkeling)PRODUCTION
2025 - Present