Seiko Cal. 3854 - 634

The 3854-634 is a sought-after Solar piece from Seiko's golden era. Powered by the 3854 caliber with 20j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-9c90168c5e61]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1988

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