a. U.S. (UN-1 7 b.)
1875. U.S. Official Post Guide, 23 (Flügel). Such matter must be forwarded to the Dead Letters Office, marked as ‘unmailable.’
a. U.S. (UN-1 7 b.)
1875. U.S. Official Post Guide, 23 (Flügel). Such matter must be forwarded to the Dead Letters Office, marked as ‘unmailable.’
