Seiko Cal. 7187 - 666

Released in 1971, the Cal. 7187 with design code 666 was part of Seiko's domestic market collection. Powered by the 7187 caliber with 28j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-d196ed60f183]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1971

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