Keywords: Railway Post Office TR51 1941 CDS.jpg Railway Post Office RMS Circular Sate Stamp cancellation N Y CHICAGO R P O DEC 7 1941 TR 51 Empire State Express Train 51 PD-USGov Original upload log page en wikipedia Railway_Post_Office_TR51_1941_CDS jpg 2011-10-11 18 57 Centpacrr 339×195× 151731 bytes <nowiki>Railway Post Office RMS Circular Sate Stamp cancellation N Y CHICAGO R P O DEC 7 1941 TR 51 Empire State Express Train 51 </nowiki> 2011-10-11 18 57 Centpacrr 339×195× 151731 bytes <nowiki>Railway Post Office RMS Circular Sate Stamp cancellation N Y CHICAGO R P O DEC 7 1941 TR 51 Empire State Express Train 51 </nowiki> Trains on stamps Stamps of the United States 1941-1950 Railway postmarks of the United States 7 December |