Seiko Cal. 5611 - 631

Released in 1977, the Cal. 5611 with design code 631 was part of Seiko's domestic market collection. It features a Silver dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-aeee2afb630d]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

17j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1977

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