Seiko Cal. 4456 - 641

The Seiko 4456-641 represents an important milestone in Seiko's 1971 lineup. It features a Green dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-2f525048c9bc]

Also known as: Navigator, Crown

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1971

Related Models

• Seiko 6652-849
• Seiko 6389-358
• Seiko 6127-428
• Seiko 3865-734
• Seiko 4417-139
• Seiko 4598-706
• Seiko 7024-470
• Seiko 7017-351
• Seiko 6649-669
• Seiko 0737-517
• Seiko 6374-717
• Seiko 0748-761