Seiko Cal. 4550 - 357

The Seiko 4550-357 represents an important milestone in Seiko's 1975 lineup. With its 18mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-19199159089b]

Also known as: Monster, Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1975

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