Seiko Cal. 4536 - 550

Seiko 4536-550

The Seiko 4536-550 represents an important milestone in Seiko's 1998 lineup. Powered by the 4536 caliber with 27j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-eac548b7c604]

Also known as: Sumo, Bellmatic

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
38mm
Case Thickness
14.6mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
200m
Dial Color
Blue Sunburst
Jewels
27j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1998

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