Seiko Cal. 6646 - 746

The 6646-746 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6646 caliber with 33j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-30fa3fb689de]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1985

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