Seiko Cal. 6638 - 720

Seiko 6638-720

This Quartz model from 1982 features a 34mm Gold-Plated case. Powered by the 6638 caliber with 27j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-7611424a688d]

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
34mm
Case Thickness
8.3mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
150m
Dial Color
Silver
Jewels
27j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1982

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seikata-wm-7611424a688d