Seiko Cal. 5657 - 521

Released in 1968, the Cal. 5657 with design code 521 was part of Seiko's domestic market collection. Powered by the 5657 caliber with 22j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-7774388a6b63]

Also known as: Emperor, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1968

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