What Is This Called? Scott #90

Thank you for the info on the website Stamp Smarter, I appreciate it. I will admit that I am struggling with identifying most of the earliest stamps I previously posted, I believe this to be a Scott #90 (embossed with grill?). What is it called when part of another stamp appears on the left margin like this one? Off-center maybe? And I'm guessing that this makes the stamp less desirable...(with coins it often make them more desirable which is why I ask) Sorry for my ignorance and thank you for your time.

You are right about off-center being less desirable, however what you see to the left is an imprint showing the engraving company's name, so may make this one more interesting to some collectors than usual off-center stamp.

What jamesg says. Generally, off-center stamps are worth less than well-centered stamps. Being off-centered, but showing the imprint is less valuable than a well-centered stamp, but not nearly as bad as a run-of-the-mill off-centered stamp. There are 1 or 2 (1 @ side like your's and maybe 1 @ top or bottom) imprints per sheet of 100 stamps - having it on your off-centered stamp shows the stamp's position in the sheet - valuable info to many collectors. Plus, how many well-centered stamps are out there that are from the same position (different sheet, one that happened to be well-centered) but don't show the imprint because it is well-centered?? So, your stamp is a good-news/bad-news story.

You can see some examples of the engraving company's margin imprint on the 1861 1-cent stamp here:

https://stampauctionnetwork.com/sr/sr7473.cfm

If you look in the vertical white space between the stamp design and the plate inscription you will fine three small dots in the color of the stamp. Those as well can help with plating (determining the stamp image's position in the printing plate), especially when the stamps of that position are not ill-centered such that the plate inscription shows.

Those dots are called layout dots and are used to help properly position the image when the printing plate is made by the siderographer. If you check the SCF glossary, there is no definition but while creating this post I sent a glossary suggestion for "Layout Dots, Lines and Arcs" to be added.

Fascinating observances.
No mention of the Postmark, that looks intriguing to me also.

Show a picture of the back

F-grill

Scott 97 with left imprint capture

Ed.: Almost forgot to mention the partial strike of a black five point star cancel.

Thank you.
could not find the 5 pointer in any of my records.
any Bib. references please?

Fritz Billig Vol 4 1944