Seiko Cal. 5646 - 421

The 5646-421 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5646 caliber with 24j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-48f2f20a1458]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

24j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1978

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