magazine identification

[tharpo]

Your magazine started out as a center pinned fxo produced in1941-42. The same type as in my photo.
Sometime in the past the original bottom was removed and an older type side pinned bottom was added.

[andrev]

Originally Posted by tharpo

Your magazine started out as a center pinned fxo produced in1941-42. The same type as in my photo.
Sometime in the past the original bottom was removed and an older type side pinned bottom was added.

thank you!
what could it be the factory who made it?