Seiko Cal. 6637 - 955

The Seiko 6637-955 represents an important milestone in Seiko's 1986 lineup. It features a Silver dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-ccb5cdd145fa]

Also known as: Tuna, Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1986

Related Models

• Seiko 3830-992
• Seiko 6188-407
• Seiko 7162-382
• Seiko 7131-904
• Seiko 4538-127
• Seiko 5682-171
• Seiko 4563-324
• Seiko 6352-899
• Seiko 5693-859
• Seiko 4423-716
• Seiko 6654-195
• Seiko 6612-863