Seiko Cal. 6638 - 994

Seiko 6638-994

Released in 1999, the Cal. 6638 with design code 994 was part of Seiko's domestic market collection. Powered by the 6638 caliber with 29j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-19b90b731c1e]

Also known as: Monster, Baby Tuna

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
8.9mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
120m
Dial Color
Silver
Jewels
29j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1999

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