The magazine with the gun is an aftermarket for a military grip angle model made after 1969 probably by Triple K. The MODEL H-D Military originally used a finger style magazine but when High Standard went away from that design in 1952-53 they made the new lip style magazine with the small follower button for the earlier models.
The thumb rest grips were not proper for this early a gun and it is nto from a MODEL E as that needed a notch to clear the safety at the back top of the left grip. A MODEL H-E grip is more likley as it had no safety except the post war version. The Models E and G-E had safetys that required the top back of the left grip be notched to clear the safety.
The thumb rest grips were not proper for this early a gun and it is nto from a MODEL E as that needed a notch to clear the safety at the back top of the left grip. A MODEL H-E grip is more likley as it had no safety except the post war version. The Models E and G-E had safetys that required the top back of the left grip be notched to clear the safety.