Seiko Cal. 6643 - 391

Seiko 6643-391

The 6643-391 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6643 caliber with 28j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-abfecc2f9284]

Also known as: World Timer, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
42mm
Case Thickness
8.4mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
160m
Dial Color
White
Jewels
28j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1995

Related Models

seikata-wm-abfecc2f9284