Quote:
Hope you found this interesting, at least.
I certainly did, great overview of something I personally find difficult,
great post. Thank you.
Your 2d Blue, looks like it had a numeral straight line duplex Postmark
(From 1854)
Possible Aberdeen, Scotland. (Numeral 1, 3-4-4-3)
Circa 1858
Also your Penny Red "A.D"