Seiko Cal. 7140 - 377

The 7140-377 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-c920f034df63]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1979

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