We found one dictionary that defines the word unofficial perforations:

Art (1 matching dictionary)

1. Glossary of Stamp Collecting Terms (No longer online)

▸ Words similar to unofficial perforations ▸ Usage examples for unofficial perforations ▸ Idioms related to unofficial perforations ▸ Wikipedia articles (New!) ▸ Words that often appear near unofficial perforations ▸ Rhymes of unofficial perforations ▸ Invented words related to unofficial perforations