Seiko Cal. 5640 - 333

Seiko 5640-333

The 5640-333 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 36j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-509a6b2e7d72]

Also known as: Sumo, Helmet

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
14.7mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
90m
Dial Color
White
Jewels
36j
Frequency
28,800 bph
Power Reserve
44 hours
Year
1997

Related Models

seikata-wm-509a6b2e7d72