Seiko Cal. 4420 - 708

The 4420-708 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-efae8d7974ae]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1971

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