Seiko Cal. 6399 - 721

Released in 1968, the Cal. 6399 with design code 721 was part of Seiko's domestic market collection. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-89fba7ad1666]

Also known as: Panda, World Timer

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1968

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