Is This1 Fr. Lois Pasteur 1925 A Double Impression Type ?

Is this a double impression type,1 fr. Lois Pasteur 1925 stamp ?

Are you aware of the printing method for this stamp and how it works?

The stamp is surface-printed (typography). A double impression would require a printed sheet to pass through the press twice. This is a very unlikely event.

There appears to be doubling of the image, especially at the bottom of the stamp. That the doubling does not appear consistently suggests it is not a double impression. It could be the result of the stacking and subsequent shifting of printed sheets when the ink was still wet.

NSK, rogdcam

The reason for writing this is the Catalogue Timbres de France, of Spink ,2019 issue .This expression is used there. Of course I may have misinterpreted it .Did they meant partial dobling of the image and how frequent does this occur ?

That picture is rather fuzzy. I suppose you should read the introduction to know what they mean with 'double impression.' Your stamps looks like a partial double impression. Being partial makes it unlikely to be printed double.

Please excuse me for the low quality of the photo. Some times it's hard for me to make images from close distance,it does look a bit foggy. Unfortunately my knowledges at French language are very poor so it's difficult for me to understand wath they meant in this section of the catalog even when I translate it. I must say it's rather confusing because there is no image of this error but only a description. I tried to search for a double impression Pasteur stamp but for some reason I couldn't find any rezolt .There is no information about a partial dobling of the image in the catalogue is there any mention of such a variety elsewhere ?

I think you would need GeoffHa. He knows a lot about French stamps and the French catalogues.

Spink/Maury has a very short introduction section. Nothing like Gibbons or Scott. Here is a better image of the listing. I'd search for the phrase in French, and for the actual catalogue number.

@post_pe, I think your stamp clearly shows that it is a double impression.
Another example found on ebay:

Thank you , cupram !
You have managed to find the matching stamp. I also appreciate the help of other members of the forum tath participate in the discussion. As usual all comments were on high professional level.