Seiko Cal. 4418 - 550

Seiko 4418-550

The Seiko 4418-550 represents an important milestone in Seiko's 1973 lineup. Powered by the 4418 caliber with 32j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-ec8c4b9e6cb8]

Also known as: Sumo

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
41mm
Case Thickness
14.7mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Silver
Jewels
32j
Frequency
36,000 bph
Power Reserve
43 hours
Year
1973

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