Seiko Cal. 5681 - 316

The 5681-316 is a sought-after Spring Drive piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-4cabc27d6c1a]

Also known as: Helmet, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1965

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