The calibre 28.10 is one of the earliest OMEGA automatic which includes 17 jewels and an early bumper movement.

A "bumper" is an early type of automatic movement. Unlike the few modern automatics, where the rotor completes a full 360-degree rotation, the rotor in a bumper moves back and forth in an arc of about 180 degrees, bouncing off springs positioned on opposite sides.

Brand:

OMEGA

Made:

1946

Model:

Bumper

Reference:

CK 2421/1

Calibre:

28.10 RA SC PC

Movement:

Automatic

Material:

Stainless steel

Features/complications:

Bumper automatic movement

Dial:

Off-white dial featuring an inner minute track with printed roman numeral hour indices and steel Dauphine hands

Case dimensions:

35 mm

Bracelet/strap:

Leather strap

Accessories:

-

SKU:

03301

Burlington Arcade · Mayfair, London