Rare 1903 Springfield 20 round Magazine WW1 *

For sale is a rare WW1 era US m1903 Springfield 20 round magazine. These were used for observation aircraft who’s co pilots could shoot back at enemy aircraft as tailgunners. I have also seen photos of the magazine being used in other ground rounds such as with trench periscope devices etc. this one is missing the follower and spring but a normal 1903 follower will work and a BAR spring. A very cool and rare piece of WW1 history.