Seiko Cal. 6657 - 988

The 6657-988 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-ec41dee437a5]

Also known as: Golden Tuna, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1976

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