Seiko Cal. 3870 - 377

Released in 1978, the Cal. 3870 with design code 377 was part of Seiko's domestic market collection. It features a Cream dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-f4b300ba31ed]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1978

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