Seiko Cal. 6635 - 637

Seiko 6635-637

Released in 1998, the Cal. 6635 with design code 637 was part of Seiko's domestic market collection. It features a Silver dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-1d2997b5927b]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
45mm
Case Thickness
14.4mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
Silver
Jewels
26j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1998

Related Models

seikata-wm-1d2997b5927b