Seiko Cal. 4540 - 356

Seiko 4540-356

This Spring Drive model from 1970 features a 40mm PVD Black case. With its 18mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-4a5295d8ec68]

Also known as: Tuna, Flighty

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
40mm
Case Thickness
12.1mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
190m
Dial Color
Black
Jewels
20j
Frequency
36,000 bph
Power Reserve
61 hours
Year
1970

Related Models

seikata-wm-4a5295d8ec68