They are my current favorite and the only series I have completed. (Although many are low grade or acid dated.)
Do you have the 3 legged or the 18/17D. I really like the 1913 T1 and T2 's. They are a great series. If you ever have a chance, I am sure we would like to see them.
I'll photograph them soon. I have an acid dated 18/17D but have 1 hole in my Dansco for the 3 legged. I don't consider those two part of the series but it makes for a good conversation when someone asks why that hole is empty and I can explain about how the 3 legged came to be and how they start out $600 and up.