Reviving this older thread as rdavid (Ralph Kimble's son) and I live in the same town and are good friends and philatelic friends.
He provided the stamps to form "Kimble's Postal Calendar", which has a date postmark for every day of the year using WW classical era stamps.
Many of the stamps were from his father's holdings.
http://bigblue1840-1940.blogspot.co...dar-and.htmlEnjoy!
(Scroll down the left side column at my blog site to find other months under the title "Kimble's Postal Calendar".)