Seiko Cal. 7185 - 638

The 7185-638 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7185 caliber with 18j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-69ffd4a07c4d]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1965

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