Seiko Cal. 6391 - 445

Seiko 6391-445

The Seiko 6391-445 represents an important milestone in Seiko's 1975 lineup. Powered by the 6391 caliber with 23j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-52c0726e80b2]

Also known as: Baby Tuna

Specifications

Movement
Quartz
Case Material
Two-Tone
Case Width
39mm
Case Thickness
11.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Green
Jewels
23j
Frequency
36,000 bph
Power Reserve
54 hours
Year
1975

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