While the American Civil War is a U.S. event, many international collectors catalog Civil War-themed stamps using these shorthand notations.
Knowing if it was in a product listing , a library archive , or a family heirloom would help me give you a much more precise description.
During the war, "Sanitary Fairs" were held to raise money for Union soldiers. Collectors often seek out items like the 10-cent Sanitary Fair Stamp sold through eBay, which are categorized by specific alphanumeric codes in dealer inventories. 2. Archival or Inventory Coding 10 Civil War - 8d
This is frequently a sub-identifier. In archival systems, "d" often stands for "document," "diary," or "division." Therefore, "8d" would be the 8th document or sub-section within that Civil War folder. 3. Military Unit Reference
In stamp collecting circles, "8d" often refers to (pre-decimal British or colonial currency), while "10" could refer to a plate number or a specific Scott Catalog number. While the American Civil War is a U
Could represent Box 10 or Folder 10 in a specific collection. Civil War: The primary subject matter of the contents.
If you found this written on the back of a photograph, a document, or a storage box, it likely follows a standard archival format: During the war, "Sanitary Fairs" were held to
Less commonly, this may refer to a specific military designation, though it doesn't fit the standard U.S. Army "Regiment/Company" format perfectly.