Seiko Cal. 5278 - 403

The 5278-403 is a sought-after Hand-Winding 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-028c4626fd08]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1999

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