Seiko Cal. 4540 - 538

Released in 1967, the Cal. 4540 with design code 538 was part of Seiko's domestic market collection. With its 21mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-3cadc904eb8f]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1967

Related Models

• Seiko 6635-704
• Seiko 5259-726
• Seiko 0765-705
• Seiko 6149-942
• Seiko 6269-303
• Seiko 7110-516
• Seiko 5695-918
• Seiko 6134-579
• Seiko 7048-563
• Seiko 6398-606
• Seiko 3822-618
• Seiko 6392-961