Luxenburg, France?
Louisville, Ky.
Station H (DPO)
22 Aug 1919
Shortpaid 3 US cents
Taxed Double the Deficiency
Luxembourg-Ville
15 Sep 1919
30 centimes postage due paid
In the early 19th century, incoming mail incorrectly addressed to "Luxembourg, France," "Luxembourg, Belgium," and "Luxembourg, Germany" all seems to have been delivered. But last week a letter I sent to a collector in Fentange (population ~1600) showing the street address but inadvertently omitting the street number was returned as "undeliverable."
Things sure have changed!