Seiko Cal. 7138 - 177

The 7138-177 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7138 caliber with 23j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-aee5182b2fa8]

Also known as: Tuna, UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1999

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