Seiko Cal. 6657 - 642

Seiko 6657-642

The 6657-642 is a sought-after Solar piece from Seiko's golden era. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-d4abc236e32d]

Also known as: Golden Tuna, Emperor

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
15.8mm
Lug Width
18mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
Silver
Jewels
31j
Frequency
28,800 bph
Power Reserve
36 hours
Year
1998

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