Seiko Cal. 4521 - 371

The Seiko 4521-371 represents an important milestone in Seiko's 1997 lineup. It features a White dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-bf1051361a14]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1997

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