Seiko Cal. 5642 - 516

Released in 1968, the Cal. 5642 with design code 516 was part of Seiko's domestic market collection. With its 20mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-0c8ed527fc86]

Also known as: Tuna, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1968

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