Seiko Cal. 4528 - 840

The Seiko 4528-840 represents an important milestone in Seiko's 1973 lineup. With its 21mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-9cd4ad93d845]

Also known as: Tuna, Arnie

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1973

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