Seiko Cal. 7140 - 539

The 7140-539 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-a4402df40081]

Also known as: Tuna, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1985

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