I found this a few days ago. Any time I can see writing I always keep as to try to identify. Glad I did on this cause it turns out to be a lid from a 25 lbcannister of gun powder. Lots of cw relics already found on this same site.
Hey bud I am so sorry I can't set this thing up to notify me and I'm just seeing you post or we could have gone out digging. If there is a next time pm me and keep till I respond. Again sorry.
Spratts Patent Ltd was a UK dog cakes (biscuit) company. Very collectible but not civil war. From Wikipedia: "Spratt's was the world's first large-scale manufacturer of dog biscuits. Its "Meat Fibrine Dog Cake" was the brainchild of American entrepreneur James Spratt who launched the biscuit in London circa 1860. The company began operations in the United States of America in the 1870s and, after Spratt's death in 1880, the company went public and became known as Spratt's Patent, Limited, and Spratt's Patent (America) Limited. Spratt's pioneered the concept of animal life stages with appropriate foods for each stage."