Seiko Cal. 3817 - 788

The 3817-788 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3817 caliber with 31j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-6d4e1af2d6c1]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1999

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