Seiko Cal. 0731 - 383

The Seiko 0731-383 represents an important milestone in Seiko's 1971 lineup. Powered by the 0731 caliber with 28j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-9ed6676754b9]

Also known as: Panda, Bellmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1971

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