Seiko Cal. 5638 - 643

Seiko 5638-643

The 5638-643 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-3e78fd7c3f23]

Also known as: Turtle, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
15.9mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Black
Jewels
30j
Frequency
28,800 bph
Power Reserve
42 hours
Year
1998

Related Models

seikata-wm-3e78fd7c3f23