Ora in esposizione: U.S.A. - Posta Penitenziaria Ufficiale (1990 - 1999) - 5 francobolli.
22. Febbraio WM: Nessuno Dentellatura: 10 vertical
![[Penalty Mail Stamps - Coil Stamp, Scrivi A20]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Official-Penalty-Mail/A20-s.jpg)
6. Aprile WM: Nessuno Dentellatura: 11
![[Penalty Mail Stamps, Scrivi A16]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Official-Penalty-Mail/A16-s.jpg)
24. Maggio WM: Nessuno Dentellatura: 11
![[Penalty Mail Stamps, Scrivi A17]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Official-Penalty-Mail/A17-s.jpg)
![[Penalty Mail Stamps, Scrivi A18]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Official-Penalty-Mail/A18-s.jpg)
24. Maggio WM: Nessuno Dentellatura: 10 vertical
![[Penalty Mail Stamps - Coil Stamp, Scrivi A19]](https://swmedia-4cd6.kxcdn.com/media/catalogue/United-States/Official-Penalty-Mail/A19-s.jpg)