Seiko Cal. 6646 - 785

Seiko 6646-785

This Automatic model from 1978 features a 45mm Two-Tone case. Powered by the 6646 caliber with 34j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-0a8f5dc1ebd3]

Also known as: Monster, Sportsmatic

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
45mm
Case Thickness
12.2mm
Lug Width
21mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
140m
Dial Color
Green
Jewels
34j
Frequency
28,800 bph
Power Reserve
54 hours
Year
1978

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