Seiko Cal. 6335 - 631

The 6335-631 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6335 caliber with 28j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-f42a7bb0bc50]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1993

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