Seiko Cal. 4420 - 816

The Seiko 4420-816 represents an important milestone in Seiko's 1965 lineup. Powered by the 4420 caliber with 17j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-e19902cb6ca2]

Also known as: Turtle, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

17j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1965

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