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Scott 0257 perfin - explain how this happens.  
 

 
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Posted 07/10/2018   11:46 pm  Show Profile Bookmark this topic Add wert to your friends list Get a Link to this Message
Here is a little quiz for you guys..Take a look at this pair of Scott 0257 stamp and explain how one is double perfin and one isn't..?

Robert




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Posted 07/10/2018   11:58 pm  Show Profile Bookmark this reply Add rod222 to your friends list  Get a Link to this Reply
Guess:
Being a Govt. puncture, it possibly was carried out on a Grover style perforator, the stamp sheet advances one stamp length, after each puncture.

Sometimes, I have read where at the end of routine using unspecified paper length, the bed hits a feed limiter, and the perforator "stutters" giving out a second rotation of the perforator punch.

Happy to stand corrected.

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Edited by rod222 - 07/10/2018 11:59 pm
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Posted 07/11/2018   11:25 am  Show Profile Bookmark this reply Add wert to your friends list  Get a Link to this Reply

Quote:
the bed hits a feed limiter, and the perforator "stutters"


This is one idea that could have happened...Remember a shutter is usually described as a horizontal indecent..This would cause a tear in the paper's perforations..There are NO tears, perfect perfs...Unless it was a vertical shutter..

Any other opinions..?

Rober
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Posted 07/11/2018   11:28 pm  Show Profile Check gportch's eBay Listings Bookmark this reply Add gportch to your friends list  Get a Link to this Reply
The solution to your question is very simple and was, in fact, included in my June 23 response to a somewhat similar question. Here is a scan of page 2 of Roy Wrigley's booklet on Canada's OHMS Officials.



Remember that this is a 'large' format stamp and would have been handled with the right hand side being uppermost (i.e. turn your illustration 90 degrees left) to perforate 10 impressions. Your left hand stamp then became thenext row to be perforated and it was struck twice.

GJP
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Posted 07/11/2018   11:41 pm  Show Profile Bookmark this reply Add rod222 to your friends list  Get a Link to this Reply
gportch,
Nicely solved, thanks for that.
Saved.
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Posted 07/12/2018   09:03 am  Show Profile Bookmark this reply Add modernstamps to your friends list  Get a Link to this Reply
Interesting Discussion.
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Posted 07/12/2018   09:13 am  Show Profile Bookmark this reply Add wert to your friends list  Get a Link to this Reply
Thanks gportch..That explains that.

Robert
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