Seiko Cal. 3836 - 407

The 3836-407 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3836 caliber with 33j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-e6539e1c0ec2]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1977

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