Hi everyone. I'm new to the forum's and this is my first post, hope it's in the correct area! I have a fair sized Canadian penny collection, just missing an 1894, and I'm working on the different varieties of the different years. I have both the large and small 1920, and I came across an odd large 1920 at a junk sale, as you may see in the pictures, the middle coin is slightly smaller diameter than another large 1920 to it's left, it also has a very large raised edge as seen in the last picture. Any idea's on what I have here as I cannot find one like this listed in any guides or online anywhere? Thanks.