Seiko Cal. 3865 - 231

Released in 1995, the Cal. 3865 with design code 231 was part of Seiko's domestic market collection. Powered by the 3865 caliber with 31j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-eca43e331c6d]

Also known as: UFO, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1995

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