2 Massachusetts Ave., N.E. Washington DC, DC , 20002      Phone: 202-633-5555         Website The machine is on the right side after getting off the escalators.  No entrance fee is required (it's one of the Smithsonian Museums).   
The costs are now $1.01. Change Machine next to Penny Machine. The shop also sells penny books. 
Machine 1 . Located downstairs right outside the museum store at the bottom of the escalators. All have 'National Postal Museum on them. The designs are:  
1)   '1st US Stamp, Ben Franklin 5 cents,  
2)   'Inverted Jenny', stamp,  
3)   'Inverted Train', stamp,  
4)    29c stamp  
Retired 2:  1)  US Mail logo Lion on rock,  2)  Stagecoach,  3)  Old Postal Truck,  4)  Postal building 
7/17/25: machine works well -Bill xD  |