Help Identifying GB Machin

Hello all

I'm looking for some help identifying a 13p GB machin I have



The one on the left in the image is the stamp in question. I have been using the following website https://adminware.ca/machin.htm but I can't seem to find this particular colour listed. I have pictured the 13p light brown next to it as a colour comparison.

Any help would be greatly appreciated.

It's basically the same as the stamp on the right. Machin catalogues tend to avoid identifying shades, and you can find many of the earlier ones in several shades. Could have left the printer like this, or could have faded.

It is not a standard color (does not match any of mine). Deegam does report shade varieties but the difference is so great I suspect the color has changed for some reason (soaking).

Is the gravure or litho and does it have any phosphor bands?

The colour does not exist, it is a badly faded example.

Sorry angore I'm fairly new to stamp collecting so not sure what you mean by gravure or litho. Can't see any visible phosphor bands.

If you look at a strong magnification, where the coloured parts meet the uncoloured parts of the stamps, you will see small dots (photogravure) or just a border (lithography).

Hold the stamps at an angle towards the light to see a kind of bar. That is the phosphor bar.

From the scans, they look like lithographed stamps. But you really need a strong magnification to be sure.

NSK has it. It is faded.

Jack Kelley

Adminware site has some information regarding printing but the site's images rely more on words than a good image.

Here is an image showing differences between Gravure(left) and Litho (right). Note the jagged edge of numerals on Gravure,

Thank you all for your help.

I have just found an example in kiloware that is almost exactly the same colour of light mushroom and quite different to the 'normal' 13p. I would also add that it is extreemly unlikely to be faded as the stamps were kept in a cupboard after removal from their envelopes. Non of any of the other stamps are faded. I would also add that it is so different I can't see how a light brown stamp would fade to that mushroom colour.

Yet, it is exactly that: faded. Lookl closer at the area close to the Queen's head where the centre phosphor bar is. You can see a hint of the original light brown (chestnut) colour. It is also visible just to the left of the Queen's forehead and the at the edge of the cross in the diadem.

I think NSK is correct.I have one pale chestnut 13p that is a paler more drab shade, though not as pale as yours. I suspect the ink in some batch was perhaps not as stable as it should have been and it has deteriorated and faded even though kept in the dark. the only other colour of 13p standard perforation Machin is a very different hue.