Ireland
Perforated on all four sides.
| Country: | Ireland |
| Type: | Postage stamps |
| Series: | 150th Anniv. of the Penny Black. |
| Nominal: | 50 p |
| Year: | 1990 |
| Material: | chalk surfaced paper |
| Size: | 40 x 30 mm |
| Perforation: | comb 15 x 14 |
| Mintage: | 500,000 |
150th Anniv. of the Penny Black.
 Postage Stamps 1840-1990 0.16$ |  150th Anniversary of First Postage Stamp |  Postage Stamps 1840-1990 0.25$ |  150th Anniversary of First Postage Stamp |