This cover is quite NICE! Other than the stamp itself which is an 1861 US# 65. On cover it has a catalog value of about $4. However the cancellation is that of a "negative image" of a star of David. This cancel enhances the value of this cover to over $25. This and other interesting cancels are referred to as "Fancy Cancels."
Now take a look at this cover....
1)The condition is fairly sound and clean.
The back of the envelope is the same.
2) This appears to be a simple letter.
3) However if you look at the postmark it says SING SING, NY. Why is that significant?
Sing Sing is a prison in upstate NY.
4) The stamp is common, US #184.
ULTIMATELY this item becomes worth $10
Now this cover is rather common postal stationary, except for the purple marking which reads " Delayed by mailing in obstructed Mail Chute." This is known as an Auxiliary Marking .
In this case it references that this letter may have been delayed in delivery as it became stuck in a mail chute. Very unusual making this cover interesting and more valuable.
This item is worth around $25
1) Take a simple look at this cover(envelope).
How is the condition? Is it torn or dirty?
2) What is on the cover? In this case just a simple letter. Obviously there is no advertisement or design or vignette(scene).
3)This is where it gets more technical...now look at the post mark(s) and cancel(s). In this case its a "bullseye" cancel with a Hartford, Ct postmark. The cancel is def cool, but common. Hartford, Ct was a very busy post office and this postmark is also very common.
4)The stamp itself...this requires some experience or the Scott Catalogue. In this case this is a US Scott#184 3cent Washington. Very common and the catalogue prices this stamp on a cover for just over $1.
Ultimately this Item is worth $1 at most!
Making Philately Phun!