How to set the time on a vintage Omega Quartz without a crown?

The birth of the “crownless” Omega was based on the watch company’s belief that time adjustment will be rare for quartz watches due to their accuracy.

A small recessed button replaced the position of the crown and time adjustment can be made by gently pressing it with a blunt tool.

To advance a minute:

Gently press and release the button.

To advance an hour:

Press and hold for 3 seconds.

To advance multiple hours (Only works on selected calibres):

Press and hold for a longer period of time (Only works on selected calibres)