Hello. On Czech auction is this badge - (Photo by Josef Jahn, "businessman" from Pilsen), do you have an idea, what it could be? Thank you.

This badge is the RCAF version of the LAC badge. The badge to the left is pale blue with the prop and hub edged in a darker, almost Royal blue stitching.

The badge on the right looks to me to me a dirtier version of the same badge, as you can see the blue around the prop and hub. However, the RCAF did issue a gold bullion version, postwar, for bandsmen.