Seiko Cal. 7091 - 827

The 7091-827 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7091 caliber with 36j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-d7f3bf40b484]

Also known as: Monster, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1981

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