Seiko Cal. 6138 - 640

Seiko 6138-640

The 6138-640 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6138 caliber with 32j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-5ef0b093aec1]

Also known as: Golden Tuna

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
40mm
Case Thickness
15.5mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
30m
Dial Color
Silver
Jewels
32j
Frequency
28,800 bph
Power Reserve
45 hours
Year
1989

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