Seiko Cal. 3887 - 640

Released in 1978, the Cal. 3887 with design code 640 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-e66338cb78ae]

Also known as: Goldfeather, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1978

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