Seiko Cal. 4420 - 870

The Seiko 4420-870 represents an important milestone in Seiko's 1968 lineup. It features a Navy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-c00254e88343]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1968

Related Models

• Seiko 6345-122
• Seiko 4411-325
• Seiko 7018-703
• Seiko 6172-674
• Seiko 5257-801
• Seiko 4442-499
• Seiko 3841-107
• Seiko 4487-160
• Seiko 4497-793
• Seiko 6185-847
• Seiko 7198-226
• Seiko 6269-583