Seiko Cal. 5243 - 510

The 5243-510 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5243 caliber with 30j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-d79deab789b6]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1970

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