Seiko Cal. 7187 - 747

The Seiko 7187-747 represents an important milestone in Seiko's 1972 lineup. Powered by the 7187 caliber with 31j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-7bc0a4624584]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1972

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