Stamporama Discussions: Perforations

United States/Stamps : Perforations

Author

Postings

LarryG

27 Nov 2015
12:17:49pm

My new Precision U.S. Specialty Multi-Gauge has a perforation gauge for Bureau Issues. There are multiple sizes for some of the perforations . An example is 10-81, 10-80 , 10-79. Perforations 11 and 12 also have multiple numbers
What does the second number indicate and can it be used to differentiate stamps?

Thank You,
Larry

seanpashby

27 Nov 2015
12:38:22pm

re: Perforations

Hi Larry, I recently wondered the same thing. Click the link below to see a lot of info. The short answer is that the second number is the distance between the holes, or pin spacing in thousands of an in.

here

LarryG

27 Nov 2015
04:43:03pm

re: Perforations

Thank you. The sites referred to are a help.
Larry

Author/Postings

LarryG
27 Nov 2015
12:17:49pm

seanpashby

27 Nov 2015
12:38:22pm

re: Perforations

LarryG
27 Nov 2015
04:43:03pm

re: Perforations

Thank you. The sites referred to are a help.
Larry