Seiko Cal. 6138 - 648

The 6138-648 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6138 caliber with 30j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-224ed4ee7e5d]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1980

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