Query On Common Vietnamese Stamps

While sorting out some used Vietnam to add to my collection I came across these two items.

1. North Vietnam 1961 SG N184 - At first glance I thought that it was damaged by another stamp with residue. On closer inspection it seems to be part of the printing. I am not sure what to make of this to be honest.




2. North Vietnam with no value - Is this a poster stamp ?

Update : North Vietnam Propaganda Label



Drew

*** Moved by Staff to a more appropriate forum. ***

OK the bottom stamp is a military frank stamp - SG NMF757, 1974

The top stamp is probably faded due to light or another stamp residue

The first stamp was actually protected by another stamp, it seems to me. What wasn't exposed to sun (?) stayed red.

Here's one is good shape.

How did this happen?

The outline of perfs in the faded area suggest another stamp(s) was laid on top of the example shown creating a screen blocking a light source. If that were the case wouldn't the faded area exposed to the light source be the red area on the right?

Don

Don, I don't understand. The area protected from the light is on the right.

KGB is correct, it has been in a packet of stamps, in cellophane, possibly in a window.
The stamp covering it was on the Right hand side.
You will see this type of thing occaisonally over the years.

Don is correct. The orientation of the perforations are such that the left side of the stamp was covered with something, or so it seems!

Peter

If the protected area on the right was covered with another stamp the perforation outline shown in the faded area would point to the left, not to the right as Scotzm's scan indicates.

Still a puzzle to me.

Don

I still don't understand.

You are correct Don. The perforations are pointed the wrong way for Scotsm's explanation!

Peter

Another puzzle. Note how the printing along the left side and top of the stamp along with the outline of the two people appear to be unaffected.

Don

I don`t think black ink is affected like the red.

I'm confused. Please help me understand what is meant by 'the perfs are pointed the wrong way'. It seems obvious to me that the red inks, which are much more fugitive than black inks, have been sun faded with another stamp covering right part.
Don

KGB and 51Studebaker:

Going back to the initial post (I can't get the image to reproduce here), the assumption is that fading, probably from a light source, has occurred on the left three-fourths of the stamp. The right one-fourth retains its normal red color.

Because there is an image of what appears to be stamp perforations on the right of the faded area the assumption is that a another stamp covered the faded area.

That being the case, the left three-fourths of the stamp would be screened from the light source and the right one-fourth (the red area) should be faded, but it is not.

My question was "how could this happen?" That is, if the left portion of the stamp was screened by another stamp how could it be faded?

Scotzm then posted an explanatory image (see above) showing a stamp overlaying the right (red) area of the stamp thus protecting the original color there. That would be a sufficient explanation except if it were the case the perfs in faded area of the original image would be pointing left instead of right.

So, if a stamp covered the left of the stamp it should have been protected from the light source and the right portion faded. Instead the reverse is the case.

If Scotzm's scan is what happened, the red on the left would have been protected, but the perf ouline would be pointing left instead of right, thus my question, "how did the fading occur to produce an outline of stamp perfs facing right?"

Probably the topic is not worth much more speculation, but the fading remains a puzzle to me.

Don