Seiko Cal. 5646 - 710

Released in 1971, the Cal. 5646 with design code 710 was part of Seiko's domestic market collection. Powered by the 5646 caliber with 32j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-81e798284e94]

Also known as: Sumo, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1971

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