Seiko Cal. 5615 - 671

Released in 1972, the Cal. 5615 with design code 671 was part of Seiko's domestic market collection. Powered by the 5615 caliber with 31j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-2a6e6f6068e6]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1972

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