Seiko Cal. 7121 - 677

The Seiko 7121-677 represents an important milestone in Seiko's 1965 lineup. With its 21mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-2101ca5faa87]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1965

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