Seiko Cal. 6631 - 210

Seiko 6631-210

The 6631-210 is a sought-after Solar piece from Seiko's golden era. Powered by the 6631 caliber with 28j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-08a0982a74dd]

Also known as: Tuna, Arnie

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
13.8mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Silver
Jewels
28j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1978

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seikata-wm-08a0982a74dd