Seiko Cal. 5646 - 711

The Seiko 5646-711 represents an important milestone in Seiko's 1981 lineup. Powered by the 5646 caliber with 26j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-3b49fe5d23d0]

Also known as: Tuna, Arnie

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1981

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