Seiko Cal. 6645 - 227

Seiko 6645-227

The 6645-227 is a sought-after Automatic piece from Seiko's golden era. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-5bfcf4b9da1e]

Also known as: Monster, Emperor

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
40mm
Case Thickness
15.3mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
30m
Dial Color
Black
Jewels
25j
Frequency
28,800 bph
Power Reserve
42 hours
Year
1977

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