I was talking to some guys about the different types of Enfield mags this past weekend.

The guys told me that the re-enforced mag lips as seen in your mag D and E was an approved retrofit. With his in mind it would help to date those two particular ones.

Do any of your mags bear and stampings?

I found this interesting thread here regarding enfield magazines...lots of info!

http://forums.gunboards.com/showthread.php?341473-weird-magazine-for-Enfield