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610 Or 613 How To Know The Differences

 
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Author Previous TopicReplies: 5 / Views: 372Next Topic  
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171 Posts
Posted 06/10/2021   10:42 am  Show Profile Bookmark this topic Add waelshami to your friends list Get a Link to this Message
Hello all, the perforation is 11 but how to know if it rotary or flat? TIA

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791 Posts
Posted 06/10/2021   12:10 pm  Show Profile Bookmark this reply Add Just_fella to your friends list  Get a Link to this Reply
what I've learned
Check the back for offset
Look around the outer frame of the image for discolouration (the rolls where cleaned as best as could but transfer happened)
If you haven't ruled it out yet
measure the image frame line to frame line
Rotary pressed stamps stretched during printing
So the flat plate is smaller 21mm I think don't quote me vs rotary 22.5mm I believe
There was a great post on here about this
Hope this helps
Here is the thread-
https://www.stampcommunity.org/topi...PIC_ID=51695
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Edited by Just_fella - 06/10/2021 12:13 pm
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Posted 06/10/2021   2:50 pm  Show Profile Bookmark this reply Add John Becker to your friends list  Get a Link to this Reply
Building on just_fella's post, both of your stamps show minor black set-off on the back side from the stacking of the sheets from the flat plate printing process. Also the right stamp has a natural straight edge and guide line at the right side, which can come only from the flat plate stamps.

The top straight edge on the left stamp could be natural or from trimming. The set-off proves it is flat plate, and the right stamp can be used to compare the height/width against this left stamp. It is better to use stamps of known flat or rotary production methods than to use a ruler, which often gives very poor resolution.

As an aside, the right stamp has a partial territorial parcel post box cancel from Arroyo, Porto Rico.
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Posted 06/10/2021   5:15 pm  Show Profile Check 51studebaker's eBay Listings Bookmark this reply Add 51studebaker to your friends list  Get a Link to this Reply
More information is here, note this section "Do I have a Rotary Sheet Rarity?"
https://stampsmarter.org/1847usa/ByYear/1923.html
Don
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171 Posts
Posted 06/10/2021   5:57 pm  Show Profile Bookmark this reply Add waelshami to your friends list  Get a Link to this Reply
Thank you all very much
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Posted 06/12/2021   09:08 am  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply
For anyone hunting for a 613 stamp, get a copy of a 612 stamp and a copy of a 610 stamp for reference comparisons. The 613 stamp has the frame dimensions of a 612 stamp and the perforation gauge of a 610 stamp. Here is an interesting reference: http://goscf.com/t/69255
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Edited by jogil - 06/12/2021 09:27 am
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