Seiko Cal. 4550 - 318

The 4550-318 is a sought-after Hand-Winding piece from Seiko's golden era. With its 18mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-db0da8c49a9b]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1978

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