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Canada 1937 Mufti Coil Stamps Scott 238, 239, 240

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Posted 07/21/2021   10:34 pm  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply
So far the largest multiple of the new different perforations that have been found are strips of only four stamps.
Large multiples of the regular perforations have been found in large strips of many stamps such as 10, 20, 30, etc.
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Edited by jogil - 07/21/2021 10:36 pm
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Posted 07/21/2021   10:40 pm  Show Profile Bookmark this reply Add wert to your friends list  Get a Link to this Reply

Quote:
So far the largest multiple of the new different perforations that have been found are strips of only four stamps.
Large multiples of the regular perforations have been found in large strips of many stamps such as 10, 20, 30, etc.


That is very different Jogil..Is their any explanation why the difference between and larger number of strips..???

Robert
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Posted 07/22/2021   09:19 am  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply
wert: It could have to do with the different perforators used. The regular perforations were perforated by a web-fed bar perforator which can continuously perforate long rolls of printed stamp paper in one direction. The irregular perforations were perforated by a sheet-fed wheel perforator which can only perforate one stamp sheet at a time. Some web printed stamps had to be broken down into some sheets in order to get the irregular perforations.
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Posted 07/22/2021   09:38 am  Show Profile Bookmark this reply Add Gilles le timbre to your friends list  Get a Link to this Reply
Excellent discussion on this complex topic. To help understand better, I found this reference of line perforation of canada very useful:https://stampsmarter.org/learning/M..._canada.html
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Posted 07/23/2021   07:05 am  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply
Similarly, U.S. coil stamps Scott 443 and 452 are compared below.


U.S. Scott 443 coil stamps (Wheel perforation 10-9.95 irregular across)


U.S. Scott 452 coil stamps (Bar perforation 10-9.85 regular across)
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Edited by jogil - 07/23/2021 07:43 am
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Posted 07/23/2021   07:46 am  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply

239 bar perforated 7.85 regular across / 240 wheel perforated 7.95 irregular across
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Edited by jogil - 07/23/2021 07:49 am
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Posted 07/23/2021   11:38 am  Show Profile Bookmark this reply Add wert to your friends list  Get a Link to this Reply
Jogil..Strange perf alignment on my Scott 166 and 169...???

Robert




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Posted 07/23/2021   12:02 pm  Show Profile Bookmark this reply Add wert to your friends list  Get a Link to this Reply
Also Scott 191 perf differences...

Robert


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Posted 07/23/2021   12:09 pm  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply
wert: These are all sheet stamps and not coil stamps. For 166 and 169, the horizontal perforations usually line up together but the vertical perforations usually do not. Why? They were perforated with a web-fed bar (11.25 horizontal) and wheel (10.94 vertical) perforator.
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Edited by jogil - 07/23/2021 12:29 pm
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