Hi, I've got a Suomi KP/-31 50 round mag with a "J" stamp on it. Wondering what this stamp stands for. I'm presuming it's the manufacturer, but haven't been able to find out. Also there is what I believe to be a painted drill mark which was done to remove another stamp.





Link to image album: http://imgur.com/a/vq3Cm

If anyone knows what the stamp stands for and why the drill mark was done that would be cool

Thanks!
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