Seiko Cal. 7156 - 313

The 7156-313 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-e53ec7465faf]

Also known as: Monster, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1975

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