Seiko Cal. 4428 - 186

The Seiko 4428-186 represents an important milestone in Seiko's 1977 lineup. It features a White dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-46c4ba705a63]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

White

Jewels

19j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1977

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