Any Idea Which Stamps Are This? They Are On The Back Of Old Post Cards

Any idea which stamps are those? I picked up an album with vintage postcards. They all seem different color and slightly diffrent dimensions .

Roman

My guess is Scott #552. Find the right buyer you might realize a quarter unless the cancellation is collectible.

howell1018, I uploaded the other 2 pics. they all seem a lighter color of green. -Thanks

Welcome.
Your stamp was one of the workhorses of the era with a production run over a number of years. During those years, there were a number of production changes which resulted in several varieties; a few of which are rare. But of course the chances of having one of the are varieties is virtually zero. For example, the #552 mentioned above saw a production of over 4 billion while one of the rare varieties only has a handful known to exist today. The best identification approach is to assume that you have the most common variety. Trying to judge color is the least reliable method for identification for an inexperienced collector. Instead look at date issued (from cancellation) and perforations to start. Then learn about the stamp printing types (flat plate, offset, rotary).
But if you would like to know more about stamps of this era you can learn more by search this forum or on the Stamp Smarter website
http://www.stampsmarter.com/learnin...arities.html
http://stampsmarter.com/1847usa/192...ntifier.html
http://www.stampsmarter.com/learnin...methods.html

Don

One more as I keep uncovering more postcards. This one is stamped in 1906 in Buffalo NY

Another work horse, 11 billion printed
http://stampsmarter.com/1847usa/190...ntifier.html
Don

I find it remarkable that in 1906 the post office could deliver a post card with just the last name, initials of the first name, city and state. The postmaster in these towns must have know every resident.

That hasn't changed too much since 1906 in some places. I live in a small town and many items have shown up in my mailbox at the post office without the PO Box # (very common) or street number (rarely).

Can anyone please tell me what this is?