Seiko Cal. 6634 - 263

The Seiko 6634-263 represents an important milestone in Seiko's 1985 lineup. Powered by the 6634 caliber with 21j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-759a7495b46d]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1985

Related Models

• Seiko 6280-337
• Seiko 7083-556
• Seiko 7045-309
• Seiko 7074-224
• Seiko 6115-171
• Seiko 3881-794
• Seiko 3847-290
• Seiko 4463-249
• Seiko 5665-704
• Seiko 5659-947
• Seiko 5243-619
• Seiko 7082-239