JUNE 1977 AMTRAK \"THE WASH LINE\" RPO TRAIN #4 SOUVENIR ENVELOPE WITH CACHET A For Sale

$JUNE 1977 AMTRAK \$
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JUNE 1977 AMTRAK \"THE WASH LINE\" RPO TRAIN #4 SOUVENIR ENVELOPE WITH CACHET A:
$25.00

Last run of Amtrak Railway Post Office between New York and Washington souvenir envelope with special cachet.
Cancelled New York & Washington RPO train #4 RPO on June 30th, 1977.

Very good condition.