I picked up these two instruments that I would like to properly ID before I eventually sell them. The first is a bomb release handle Mark 4 Model 3 and the second is a Army Air Forces ammunition counter for left & right guns. I searched around on the internet but have found next to nothing about them. What I would really like to know is what specific aircraft are these instruments associated with? I know the ammunition counter dates from WWII but I am not positive about the bomb release handle? Any help would be appreciated, thanks!