Seiko Cal. 3877 - 654

Released in 1974, the Cal. 3877 with design code 654 was part of Seiko's domestic market collection. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-1cde658de10f]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Champagne

Jewels

35j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1974

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