Seiko Cal. 6310 - 637

Seiko 6310-637

The 6310-637 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6310 caliber with 35j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-d690079ef5c9]

Also known as: UFO, Sportsmatic

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
44mm
Case Thickness
11.8mm
Lug Width
20mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
100m
Dial Color
Champagne
Jewels
35j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1970

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