Seiko Cal. 6231 - 720

The Seiko 6231-720 represents an important milestone in Seiko's 1978 lineup. It features a Navy dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-cdaac304fddc]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1978

Related Models

• Seiko 3819-679
• Seiko 0764-531
• Seiko 3899-777
• Seiko 3878-701
• Seiko 5278-852
• Seiko 3877-475
• Seiko 4545-609
• Seiko 5681-264
• Seiko 6635-523
• Seiko 6274-310
• Seiko 7083-668
• Seiko 6256-218