Seiko Cal. 6631 - 453

Seiko 6631-453

The 6631-453 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6631 caliber with 30j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-90c4d272d12b]

Also known as: Sportsmatic

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
14.3mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
70m
Dial Color
Silver
Jewels
30j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1975

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