Seiko Cal. 4520 - 378

The Seiko 4520-378 represents an important milestone in Seiko's 1980 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-093f218a529e]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1980

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