Seiko Cal. 6638 - 383

Seiko 6638-383

Released in 1969, the Cal. 6638 with design code 383 was part of Seiko's domestic market collection. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-c701d5845316]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
9.7mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Blue Sunburst
Jewels
32j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1969

Related Models

seikata-wm-c701d5845316