Seiko Cal. 6231 - 754

This Solar model from 1967 features a 37mm Two-Tone case. Powered by the 6231 caliber with 32j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-394272e10015]

Also known as: UFO, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1967

Related Models

• Seiko 5649-554
• Seiko 7145-509
• Seiko 6338-248
• Seiko 5280-694
• Seiko 5259-907
• Seiko 6165-790
• Seiko 3825-377
• Seiko 0786-683
• Seiko 6152-502
• Seiko 4536-845
• Seiko 6258-970
• Seiko 6392-296