Seiko Cal. 6391 - 720

The Seiko 6391-720 represents an important milestone in Seiko's 1989 lineup. It features a Cream dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-9daea992431d]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1989

Related Models

• Seiko 7175-638
• Seiko 6276-815
• Seiko 7085-875
• Seiko 6143-601
• Seiko 6367-875
• Seiko 7046-392
• Seiko 4428-781
• Seiko 5618-469
• Seiko 3811-487
• Seiko 6664-744
• Seiko 5220-782
• Seiko 6219-269