Seiko Cal. 4540 - 688

Seiko 4540-688

This Solar model from 1966 features a 37mm Titanium case. With its 18mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-ccbcfcf53d3a]

Specifications

Movement
Solar
Case Material
Titanium
Case Width
37mm
Case Thickness
9.7mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
70m
Dial Color
Navy
Jewels
22j
Frequency
21,600 bph
Power Reserve
38 hours
Year
1966

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