Seiko Cal. 5637 - 447

The Seiko 5637-447 represents an important milestone in Seiko's 1992 lineup. Powered by the 5637 caliber with 21j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-4334a8bca24f]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1992

Related Models

• Seiko 7037-435
• Seiko 6230-217
• Seiko 0767-880
• Seiko 6285-649
• Seiko 6615-214
• Seiko 3840-307
• Seiko 3819-691
• Seiko 6313-922
• Seiko 5647-881
• Seiko 3833-951
• Seiko 5611-823
• Seiko 3888-490