scub
Member 
Posts: 113
What I collect: WW (without restrictions)
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Post by scub on Nov 12, 2023 17:31:35 GMT
By now, i work on my new Portugal album. I am a bit confused by the "Don Luis I" 300 Reis from 1875. ScottNr: 50 , MichelNr: 45 , AlfinsaNr: 47 Color: Violet  Perforation: left 13,5 and right 12,5 But the shoud have the same collor. Or did I miss something. |
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djcmh
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Posts: 773
What I collect: Worldwide
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Post by djcmh on Nov 12, 2023 17:41:28 GMT
Not seeing anything in my Mundifil regarding color errors on this, so my guess would be color changing due to exposure to something in the environment over time affecting the red elements in the ink. Just a theory though
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Beryllium Guy
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Posts: 5,659 
What I collect: Worldwide Stamps 1840-1930
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Post by Beryllium Guy on Nov 12, 2023 18:28:11 GMT
scub Thank you for your post. I would tend to agree with Gene ( djcmh ) that if there is no color error or other listing for a light blue variety of this stamp, the most logical explanation is that it is a color changeling. Also, on the Scott numbers, just for your info: Perf 12.5 on regular paper is Sc50, and on enamel surfaced paper is Sc50b (your blue example is one of these). Perf 13.5 on regular paper is Sc50a, and on ribbed paper is Sc50c (your violet example is one of these).
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rod222
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Posts: 9,914
What I collect: Worldwide Stamps, Ephemera and Catalogues
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Post by rod222 on Nov 12, 2023 23:54:46 GMT
That's an extraordinary example of colour changeling. My examples I have come across   |
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scub
Member
Posts: 113
What I collect: WW (without restrictions)
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Post by scub on Nov 13, 2023 8:05:12 GMT
I also considered the possibility that there were editions for Portuguese colonies that could only be recognized by their color.
Comparable to the French "Pax & Mercur" from 1877-78.
I also have to look out my old "Gebrüder-Senf" catalog from the 1920s.
There may be some “news” there.
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stanley64
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Posts: 1,828
What I collect: Canada, USA, Netherlands, Portugal & Colonies, Antarctic Territories and anything that catches my eye...
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Post by stanley64 on Nov 14, 2023 18:32:49 GMT
You have your work cut out for you scub :-) I realise my initial posting to the thread (now deleted) was rather simple given some additional research of seller sites, auction catalogues and reading past journal articles. The D. Luís I are a complicated series and definitely not for the faint of heart as it would appear they have their challenges given that they were re-issued several times, the overseas-territory issues which uses the same image and let us know forget the forgeries.
For now though, agreed, the original stamps in question are listed as being printed with both colours: violet and clear violet and I am inclined to agree with others that your 'blue' stamp is a changling. Given basic colour theory (red + blue = purple), it would make sense that the original stamp has been exposed to some environmental factor e.g. sunlight which has changed its original colour similar to the one in this example,
Live and learn...
Have fun and happy collecting!
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scub
Member
Posts: 113
What I collect: WW (without restrictions)
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Post by scub on Nov 15, 2023 13:44:08 GMT
Thanks "stanley64"
Color changes are always an issue with old stamps.
Thanks for your contribution.
There are clear color differences in your picture.
It will most likely be a color change.
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