I have a FN 100 in 22 Short. The very first Browning .22 Semi auto. The loading port is on the top of the stock, not the side. (They moved the port to the side to increase capacity) The patent was sold to Remington in 1922 as the model 24 for USA sales. When the patent ran out Browning Started selling it as the Browning .22 Semi auto in 1956 for USA sales. The only info on the date made is 1914 to 1955. I believe mine was made either in the first year 1914 or second 1915 as the serial number is 110x. they stopped making them due to WWI, then resumed after. so could be later as I have no idea as to how many were made in a year, or if they started at 1001. Anybody else have one? or any more info? The below image showing top load is from a manual I found online.