Seiko Cal. 6685 - 733

The 6685-733 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6685 caliber with 23j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-c5a8dd37442d]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1974

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