What button-collectors call a "Jacksonian" button was an unusual version of brass flatbutton with a raised emblem and an applied rim... called Jacksonian because they were popular in the United States during the presidency of Andrew jackson (1829-37). The close-up photo below shows the front and back of one, on which you can clearly see the applied rim surrounding the flatbutton's body. Your find is definitely a Jacksonian button which has lost its applied rim.
In the "group photo" below, I believe your find is button #6 in row #6, showing a sailing ship with three masts. You'll probably need to use T-Net's "Enlarge-the-image" function to see the button's emblem detail. I have a .bmp imagefile of that photo, which shows your button with perfect clarity, but at 16 megabytes that bitmap file exceeds TreasureNet's photo size limit.
Nhbenz is right. of course... the backmark's spelling of the word "color" as "colour" means it is a British-made button. The majority of the Jacksonian buttons I've seen have a British backmark, which at least kinda-sorta indicates that this very unusual version of flatbutton was invented in Britain.