Seiko Cal. 6687 - 538

Seiko 6687-538

The 6687-538 is a sought-after Solar piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-e03fb5a1271c]

Also known as: Monster, Navigator

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
35mm
Case Thickness
10.3mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
180m
Dial Color
Navy
Jewels
23j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1974

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