Seiko Cal. 3854 - 648

The Seiko 3854-648 represents an important milestone in Seiko's 1978 lineup. Powered by the 3854 caliber with 31j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-90ae7fb59331]

Also known as: Monster, World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1978

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