Seiko Cal. 4540 - 621

Seiko 4540-621

The Seiko 4540-621 represents an important milestone in Seiko's 1972 lineup. Powered by the 4540 caliber with 25j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-ee09b3a0a27e]

Also known as: Turtle

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
35mm
Case Thickness
8.2mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Silver
Jewels
25j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1972

Related Models

seikata-wm-ee09b3a0a27e