Seiko Cal. 4437 - 277

The Seiko 4437-277 represents an important milestone in Seiko's 1967 lineup. Powered by the 4437 caliber with 33j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-82ff3bc76d50]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1967

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