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Author: Subject: Neophyte question
davpot
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biggrin.gif posted on 11/12/2016 at 11:41
Neophyte question


I am wondering if someone can explain the difference betweem COMB perfing, and HARROW perfing. Catalogs dont seem to say!
Many thanks for any help😂
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GregMirsky
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[*] posted on 11/13/2016 at 00:28


Harrow perforation: Perforations produced by a harrow machine, which completes an entire sheet or pane of stamps in one operation.
Comb perforation: Three sides of a stamp are perforated in one stroke (T-comb).

You really can not distinguish between them on a single stamp. You need a block of four with margins.
Harrow perforation usually will have extra hole on each side of the margin, when comb perforation will have lines of perforations straight through margin.
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cec71
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[*] posted on 11/16/2016 at 11:09
Harrow perfs


Have attached a scan a an article from the Post Rider to assist in the differentiation. Also Rev Tann had another article in the Post Rider (I have the article but not the date) illustrating the sheet arrangement of stamps with the three types of perfs...

harrow.jpg - 159kB
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davpot
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[*] posted on 11/17/2016 at 14:19


Hi Cec and Greg, Thanks much for your replies! Since I am miffed here, any help is a help!!😂
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