Seiko Cal. 6657 - 767

Seiko 6657-767

The Seiko 6657-767 represents an important milestone in Seiko's 1978 lineup. Powered by the 6657 caliber with 25j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-1bda2efab1a2]

Also known as: Navigator, Arnie

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
35mm
Case Thickness
13.8mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
110m
Dial Color
Navy
Jewels
25j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1978

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