Stamps, overprint under black light design
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Canada
postage2009, Apr 2 International Year of Astronomy issue unwmk p. 13
| - | 54 | multi | overprint under black light | |||
| - | 54 | multi | overprint under black light |
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| - | 54 | multi | overprint under black light | |||
| - | 54 | multi | overprint under black light |