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How Were Such Serrated Perforations Produced?

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Bedrock Of The Community
Australia
37463 Posts
Posted 12/08/2022   02:59 am  Show Profile Bookmark this reply Add rod222 to your friends list  Get a Link to this Reply
Soon as I see a "No"
I see itching for an argument, not interested.
See you later.

Sandwich baggies !...Sheesh.
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Edited by rod222 - 12/08/2022 02:59 am
Pillar Of The Community
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9464 Posts
Posted 12/08/2022   07:40 am  Show Profile Bookmark this reply Add rogdcam to your friends list  Get a Link to this Reply
I am having problems downloading images but take a look at Lot 1030 in the following Cherrystone auction. It contains an exhibit specific to the Guadalajara provisional issues and how to detect fake serrated examples. As for how the serrations were accomplished it specifies only a "mechanical device".

https://www.cherrystoneauctions.com...+Guadalajara
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Valued Member
105 Posts
Posted 12/08/2022   6:07 pm  Show Profile Bookmark this reply Add Prexie3c to your friends list  Get a Link to this Reply
Hi there everyone, thank you very much for all the replies. This is getting interesting (and confusing).

The Linn's article called it "serrated perforations". An online search of a MEPSI certificate of a similar stamp also gave "serrate perfs".

The exhibit in the Cherrystone link just called it "serrates", made with a mysterious mechanical device.

Yet, Spink described it as"serrate roulette", though such a roulette cannot be found in the references that rod222 provided (Archer roulette perhaps?). I did find a definition of a "serrate roulette" here --> https://brixtonchrome.com/pages/phi...with-g-to-z, which says that 'A serrate roulette is a roulette in which the cuts to the paper are rounded', though I struggled to see the rounded areas on the image of the stamp that I posted - the spikes on the stamp are all 'pointy' (NB: I do not own the stamp).

And then, there is the very similar-looking embossed paper seal posted by John Becker - all pointy spikes too, though the spikes are longer,and the cutting much more well-defined - not sure if this means an entirely different production method (die-cutting as suggested by Parcelpostguy?) is used in this caee.

Sure a lot to figure out and learn here!
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Posted 12/08/2022   6:31 pm  Show Profile Bookmark this reply Add rogdcam to your friends list  Get a Link to this Reply
Cornphila also uses the term " serrate roulette".
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