Any Information on Cat Sixty Crawler and Cat 2Ton Crawler?

Hi all, my boss has just purchased these two vintage crawlers. They both run and are in quite good condition considering they are almost 100 years old. We are going to do a full restoration on both of them. Hopefully we don't need many parts because they will probably have to be hand made. We have a few good diesel fitters and a good boilermaker on hand as well. We have an excellent machine shop nearby. I know there probably isn't many people alive that have knowledge of these beautiful old machines but I am looking for any information that would be useful to a resto project. We are not sure even what color they should be. Any ways thanks for any input much appreciated.