Filtering by year will reset all existing filters. If filtering by year, do so before adding other filters. As unissued stamps do not have a date in the catalog, use a start date of '0' (zero) to include these.
Filtering by year will reset all existing filters. If filtering by year, do so before adding other filters. As unissued stamps do not have a date in the catalog, use a start date of '0' (zero) to include these.