Seiko Cal. 3865 - 851

Released in 1973, the Cal. 3865 with design code 851 was part of Seiko's domestic market collection. Powered by the 3865 caliber with 33j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-859cbe4616ee]

Also known as: Turtle, Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

33j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1973

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