Seiko Cal. 3860 - 764

Released in 1987, the Cal. 3860 with design code 764 was part of Seiko's domestic market collection. With its 18mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-f8c2de790ef3]

Also known as: Monster, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Champagne

Jewels

29j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1987

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