Seiko Cal. 3891 - 735

Seiko 3891-735

The Seiko 3891-735 represents an important milestone in Seiko's 1971 lineup. Powered by the 3891 caliber with 18j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-39529e106cde]

Also known as: Helmet, Navigator

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
39mm
Case Thickness
15.0mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
Blue Sunburst
Jewels
18j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1971

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