Hong Kong
The numeral is a perfin, and can be seen clearly when looking from the gummed side
| Country: | Hong Kong |
| Type: | Postage stamps |
| Series: | Birds |
| Nominal: | 20 HK$ |
| Year: | 2006 |
| Material: | Granite |
| Size: | 28.5 x 33.5 mm |
| Perforation: | Syncopated 13½ x 13¼ |
