Seiko Cal. 6311 - 502

The 6311-502 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6311 caliber with 25j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-00762601fc71]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

25j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1985

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