Seiko Cal. 7178 - 623

The 7178-623 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7178 caliber with 23j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-4a34147a2197]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1998

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