Need Help Identifying "US Postage -One Shilling" Stamp From Estate

Hello everyone,



I'm new to the forum and recently acquired a large estate collection that included many classic stamps.



One of the stamps was mounted in a Subad Stamps dealer card identifying it as U.S. Scott #28 (3¢ Green George Washington, 1856). While researching it, I noticed that the stamp itself appears to read "U.S. POSTAGE" at the top and "ONE SHILLING" at the bottom, which doesn't seem to match the dealer card.



I'm hoping someone here can help me identify exactly what this stamp is. Is it a genuine cataloged issue, a local post, a cinderella, a fantasy issue, or something else?



I've attached high-resolution scans of the front and back. Any information about its identity, origin, or approximate value would be greatly appreciated.



Thank you in advance for your time and expertise. I'm looking forward to learning from the knowledgeable members of this community.

The top of the stamp reads, "POSTAGE" not US Postage.

Your stamp was issued by Great Britain.

Stock cards get reused, but not always relabeled.


Edit:

How did you, "acquire" the large estate collection?

That helps us understand where you need to be pointed, such as to a library for a Scott Catalog. Currently, based upon your question, you are believing extraneous information rather than reading and understanding the stamp itself. All stamps have the country name or the then current British monarch.

Thank you for your quick reply. I really appreciate you taking the time to look at it.

That makes sense about the stock card being reused and not relabeled. I hadn't considered that possibility.

Would you happen to know which Great Britain issue this is, or perhaps its Stanley Gibbons or Scott catalog number? I'd really like to identify it correctly and learn more about it. Also, is the large "53" a standard numeral cancel that might help date or identify the stamp?

Thank you again for your help. As someone who's still learning, I really appreciate the expertise shared here.

I banged out my edit while you were responding.

Why the concern about value? Do you plan to resell the material?

The cancellation is common for the era and the used condition with its faults keeps it in the fun to collect but worthless for resale category. Chances are whatever you paid for the estate collection is what the estate collection is worth, even if acquired for "free" via gift, theft, storage auction sale or low cost options such as a thrift store, flea market or garage sale.

Collecting is a fun use of time; reselling stamps is a waste of time and money unless your time is valued as "worthless" and selling for less than what you paid is a fine outcome.

Your stamp appears to be SG 71, 72 or 73 depending on shade, issued on Nov 1, 1856. In Scott it is 28. A fairly pricy item but the condition of your copy is poor so it would only be worth a few dollars. In stamp collecting condition is everything.

It is the green or pale green variety. Not the deep green one, or a faded example of the deep green one.
It is damaged. Although it is somewhat better than a space filler, unless that fold at top is a tear hidden by the hinges.

The damage is lamentable, because the cancellation is light and the stamp, otherwise, would be a nice example. On a good day, it might make £ 10 (max) but £ 5 is likelier.