Seiko Cal. 3891 - 787

The 3891-787 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-773ccb2a8679]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Burgundy

Jewels

19j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1977

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