Seiko Cal. 6638 - 293

Seiko 6638-293

The Seiko 6638-293 represents an important milestone in Seiko's 1965 lineup. Powered by the 6638 caliber with 18j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-6beb63aea8a0]

Also known as: Bullhead, Arnie

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
38mm
Case Thickness
13.4mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Navy
Jewels
18j
Frequency
36,000 bph
Power Reserve
43 hours
Year
1965

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