One problem with graniteware is that it chips easily. You can see one chip in the photo and there is another on the other side. Doesn't affect the usefulness of the pot though.
You can still buy white graniteware today. I have two pots that I bought from Lehman's Hardware several years ago. I chose white because I use them for plant dyeing wool. The white allows me to see the intensity of the dye bath. If I were buying graniteware for cooking I would probably buy the navy blue.
I look for graniteware at thrift shops and yard sales. It is a hard working material, has a classic and modern look about it and it reminds me of good times in grandma's kitchen.