01-24-2020, 12:12 PM
Actually, if you copy/paste that image into a decent viewer, like IRfanview, and enlarge it, although the resolution is not high enough to see them really clearly, you will see the original knobs were a rosette type. These from Radio Daze are the closest match I could find:
http://www.renovatedradios.com/product.php?product=227
http://www.renovatedradios.com/product.php?product=227