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About this video:

The recent addition of small hole perforation listings to Washington-Franklin and Presidential series coils have raised many questions among philatelists and stamp dealers. Learn how to use Photoshop to measure perforations. Explore possible explanations for coil perforation hole size differences.

Presenter:  Clark Frazier

Video Duration: 56 minutes

This is a video recording of a session that occurred during the 2020 Summer Seminar Online learning event.