Tiffany & Co Spode Copeland platter 1859?

I recently acquired this exquisite 18-inch Tiffany & Co Copeland Spode platter from Sandpoint, Idaho. What brings me here is the lack of information I could find online about this specific item.

Despite that, the platter is in remarkable condition, with only some minor gold gilding loss along the inner edge and a few faint scratches. It's difficult to determine if these scratches are a result of utilitarian wear or something else entirely.

The back of the platter showcases the distinguished Tiffany and Company stamp, along with the spode and copeland makers marks. Additionally, there are several intriguing stamped impressions that I have captured in photographs.

Curiously, there is an ink inscription of "1859" on the back. Whether this date holds any legitimacy or if it is an attempt to forge the manufacturing date remains unknown.

Overall, this platter is an incredibly fascinating item, and I would greatly appreciate any insights or knowledge you may have to offer.