Seiko Cal. 4571 - 637

Seiko 4571-637

The 4571-637 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-e5ef4393e6bb]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
40mm
Case Thickness
9.8mm
Lug Width
22mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Silver
Jewels
24j
Frequency
36,000 bph
Power Reserve
63 hours
Year
1979

Related Models

seikata-wm-e5ef4393e6bb