Seiko Cal. 6391 - 536

The 6391-536 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6391 caliber with 34j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-c0b4c725bf68]

Also known as: Panda, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Cream

Jewels

34j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1974

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