From the Muskegon Chronicle:
MUSKEGON, MI – Postmaster William Rowe is searching for the relatives of long-gone recipients after an unopened World War II-era letter turned up in the mail recently.
The letter was originally addressed to a “Mr. and Mrs. Sensabaugh” at a Washington Avenue home in Muskegon that’s now empty, and bore an initial postmark from a 1945 Army Post Office. The return address listed the letter’s sender as Sgt. Myron C. Cook based in New York.
There was a more recent postmark on the letter — from Minneapolis 2013 – printed over the old.
“We think somebody put it back into the mail stream,” Rowe said.
I notice that the newspaper story (and the comments on the newspaper’s web site) don’t mention the glaring anachronism on the envelope: the four “A” stamps! Letter stamps were “rate change” stamps, good for whatever the new first class letter rate turned out to be. The “A” stamps were issued for the May 1978 rate increase, and were valued at 15 cents. So someone applied those stamps to the envelope between May 1978 and September of last year, when the envelope was cancelled again.