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Rare Perforation Varieties

15 lessons in this topic.

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1

What Are Rare Perforation Varieties?

10 learning points

2

How Rare Perforation Varieties Occur

10 learning points

3

Imperforate Varieties

10 learning points

4

Double Perforations

10 learning points

5

Shifted Perforations

10 learning points

6

Blind and Missing Perforations

10 learning points

7

Compound Perforation Varieties

10 learning points

8

Misaligned Perforation Varieties

10 learning points

9

Experimental Perforation Issues

10 learning points

10

Perforation Changes Within a Stamp Issue

10 learning points

11

Famous Perforation Rarities of the World

10 learning points

12

Detecting Genuine Rare Varieties

10 learning points

13

Forged and Altered Perforation Varieties

10 learning points

14

Cataloguing Rare Perforation Varieties

10 learning points

15

Building a Collection of Perforation Varieties

10 learning points

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