Seiko Cal. 4438 - 550

The 4438-550 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4438 caliber with 23j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-010c2adcdeed]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1971

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