Are there spots on the back of the dial where you see they were glued in? Sometimes the markers have a pin that mounts through the dial and gets glued in. To remove those kinds I scrape off excess from the back and give a gentle push with a fine punch tool, you can probably use a pin thats not too sharp. if it has any resistance there are things that help dissolve the glue but use exceedingly sparingly as to not have any go through onto the dial. Hope that helps