Seiko Cal. 5240 - 631

Released in 1965, the Cal. 5240 with design code 631 was part of Seiko's domestic market collection. Powered by the 5240 caliber with 35j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-c71ea009fb56]

Also known as: UFO, Golden Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1965

Related Models

• Seiko 7183-245
• Seiko 4527-308
• Seiko 0713-731
• Seiko 4491-844
• Seiko 0737-705
• Seiko 6217-191
• Seiko 6374-893
• Seiko 0767-326
• Seiko 6338-145
• Seiko 6161-842
• Seiko 0728-780
• Seiko 6122-754