can you ID this magazine?

[ActionYobbo]

All the production dates I got from wikipedia. The back and bottom are exactly the same as other C2 magazines.
I will post more pictures tonight.

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[browningautorifle]

All the production dates I got from wikipedia.

Part of our problem here, I knew they were out of whack but not that far out...not worth relying on.

[ActionYobbo]

Seems these were made in Canada prior to 1958. I have found 20 round mags and 30 round mags. So far I found that Century may have brought them to the US from Canada in the late 80's to early 90's.
Still cant find a reason why the DND made these and why they have the same NSN as standard mags.