Seiko Cal. 3861 - 687

The 3861-687 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3861 caliber with 35j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-dc1d20217432]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1998

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