Seiko Cal. 4423 - 540

The Seiko 4423-540 represents an important milestone in Seiko's 1970 lineup. With its 20mm lug width and 14.2mm profile, it sits comfortably on most wrists. [seikata-wm-e871794da112]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1970

Related Models

• Seiko 7157-699
• Seiko 5266-992
• Seiko 6325-712
• Seiko 5277-428
• Seiko 6213-677
• Seiko 6389-179
• Seiko 4417-472
• Seiko 6642-837
• Seiko 6166-858
• Seiko 6199-719
• Seiko 4496-987
• Seiko 6262-827