Seiko Cal. 4550 - 773

The Seiko 4550-773 represents an important milestone in Seiko's 1970 lineup. With its 21mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-ad71b8afcbbf]

Also known as: Tuna, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1970

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