Seiko Cal. 6641 - 423

Seiko 6641-423

The 6641-423 is a sought-after Solar piece from Seiko's golden era. Powered by the 6641 caliber with 22j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-62c05234ca08]

Also known as: Tuna, Baby Tuna

Specifications

Movement
Solar
Case Material
Titanium
Case Width
42mm
Case Thickness
13.5mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
White
Jewels
22j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1991

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