Seiko Cal. 3816 - 640

Released in 1978, the Cal. 3816 with design code 640 was part of Seiko's domestic market collection. Powered by the 3816 caliber with 35j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-6709cd3560a9]

Also known as: Panda, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

35j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1978

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