My daughter was left 5 or 6 six of these pictures. I'm not sure if they're watercolors. They are signed Robert Chase. I've looked him up. Now, are these actually worth anything? I see on ebay a couple of different things and the internet has some things, but what's the difference? Theses are not oils for sure. Has anyone info to share? I don't think they are te most beautiful, and they need to be cleaned. Maybe they were just mfg.