Migueldiaz, Thank you very much. As you mentioned, dating these can be VERY tricky. Every time I think I've made some progress in doing it something like this shows up. It would probably help if I would just wait for an item to actually get to my door before posting then I might have a better idea.
Hopefully I will be able to take a few better pictures of the spine and the area in discussion once it arrives. Below is one other that I have acquired that I will post in a separate thread as soon as it arrives. Thanks again for you help.
Robert