Seiko Cal. 6156 - 640

The 6156-640 is a sought-after Quartz piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-435b3bffad7e]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

44mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

33j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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