@Brushyrun:
I should have included this in my first post.
Do they have a bamboo type frame around them?
Gee, I don't know. I just went and looked at the frames. Actually they could be bamboo. They are very hard and dense, so hard I thought they were a colored plastic. But there is a grain, and whoever framed them had them framed with non-glare glass. I would think if they had them framed by a frame shop and used non-glare glass, they wouldn't use plastic frames. Does it mean anything if the frame is bamboo? Only one of the four is signed. And the signature is so faded that I couldn't make it out until CongoMama told me who had done them.