Found this Mid Century framed tile composition at Goodwill - it's a mystery.

This got my spidey senses tingling. Midcentury, I think 50's or 60's. It's a heavy, framed tile composition on plaster or some other hard medium.

The words "Tromp Muziekconcours" appear with a logo, which I found translates to Trumpet Music Festival from Dutch. I can see two birds, but can't find anything looking like a trumpet.

There's a signature on the back, which I assume is the artist.

Maybe a commemorative plaque given to the winner of the festival? Ideas?