Differences in Formula S Emblems

My NOS 2579443's have vertical pins and are flat. That's also the part number in my factory '66 parts manual. The only book I have for the '65 model is a Mitchell Collision Guide which shows the same part number for that year. I do remember seeing the horizontal pins on some emblems though, like the one Pishta posted. Kinda odd that's only one number different when it's a whole year older.