Seiko Cal. 4538 - 907

Seiko 4538-907

The 4538-907 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4538 caliber with 18j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-a7d5e8d639b5]

Also known as: Bullhead, Sportsmatic

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
44mm
Case Thickness
12.3mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Burgundy
Jewels
18j
Frequency
28,800 bph
Power Reserve
69 hours
Year
1996

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