Seiko Cal. 6243 - 991

The 6243-991 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6243 caliber with 24j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-a1c1d7ca4e4b]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

130m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1965

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