Seiko Cal. 3897 - 920

The 3897-920 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3897 caliber with 31j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-e12472e10314]

Also known as: Sumo, Panda

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1969

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