Seiko Cal. 5656 - 904

The 5656-904 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-acbd7e2f95b8]

Also known as: Silverwave, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Black

Jewels

23j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1966

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