Seiko Cal. 6277 - 637

The 6277-637 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6277 caliber with 28j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-455e174f34fb]

Also known as: Panda, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1968

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