Seiko Cal. 5638 - 380

Seiko 5638-380

The 5638-380 is a sought-after Solar piece from Seiko's golden era. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-e94bfc196ff2]

Also known as: Tuna, Bullhead

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
45mm
Case Thickness
10.8mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
100m
Dial Color
Black
Jewels
17j
Frequency
21,600 bph
Power Reserve
38 hours
Year
1969

Related Models

seikata-wm-e94bfc196ff2