Seiko Cal. 6231 - 993

Seiko 6231-993

The Seiko 6231-993 represents an important milestone in Seiko's 1966 lineup. Powered by the 6231 caliber with 20j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-22f66d0b3be1]

Also known as: Monster, UFO

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
11.6mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Blue Sunburst
Jewels
20j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1966

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