I have some brazilian second world war stamps!

These were collected when I was a child in 80’s and 90’s. Lots of Mongolian, Polish and some from other countries.
I do not collect stamps but have two albums almost full. I’m just curious to hear what do I have and how common are these? Few pictures attached. That’s maybe 10-15% of it all

Anyone have an idea what these stamps are worth?

This is the the repost of the first because of a little miscommunication,but I know it's Hindenburg stamps I have a whole lot of them just I've never seen the cancellation before

Sent from Austria, received an 8-puffin overprint upon arrival at Lundy.

Someone showed me this stamp, claimed it's likely released by local/private postal service in NY or Baltimore at ~1841 - 1845, and he could not find it from any catalogue. Can anyone recognize it?

Thank you.

any suggestions as to where to sell a large collection of unused, unhinged U.S. stamps? Colombian expedition, Scott #505 error, tons of sheets from the 1930s/40s …. i was being offered 10% of face value - and $200 for all of the Colombian expedition (up to and including $3). all unused,excellent condition, unhinged

Hi! I just inherited my father’s stamp collection and it’s fairly large. I have no idea where to start or what to do with it. Any stamp collecting 101 tips?

Hi friends! I am new to collecting after inheriting a collection from my great grandfather and really enjoying diving into the world of stamps! I have tried to identify these both using apps to no avail. One said it’s from Thailand, which it clearly isn’t but I’m really struggling to identify. Any thoughts?

I do not collect these categories.
I am seeking children, cartoons, book stamps, author stamps.

Please reach out with your offers.

I’ve never done stamp collecting before and from what I’ve searched I understand that because these are mostly circulated postage they aren’t worth much.

However is there any stamps that are of significance historically?

The only ones that are new are the “her majesty the queen sixteenth birthday”.

I’m thinking I’ll keep one of any duplicates and get rid of the rest, for sure keep the ones from outside Canada. But otherwise clueless pretty much sums it up.

I was putting away some stamps from my subscription and came across this. I have thousands of plate blocks, never had serial number 1 before, nor have I seen one while I have been looking.