Seiko Cal. 6641 - 543

This Solar model from 1984 features a 36mm PVD Black case. Powered by the 6641 caliber with 21j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-8a069e5dd197]

Also known as: Tuna, Bullhead

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1984

Related Models

• Seiko 5634-717
• Seiko 4547-837
• Seiko 4597-265
• Seiko 5699-885
• Seiko 6616-816
• Seiko 0735-482
• Seiko 5613-802
• Seiko 7121-747
• Seiko 6234-410
• Seiko 4535-527
• Seiko 0760-349
• Seiko 4431-991