Seiko Cal. 0784 - 638

The 0784-638 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0784 caliber with 21j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-f4bdcc18df24]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1978

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