Strange nippled primer on Dutch 9x19 round

There is an AI ball round in my collection with a strange green primer with a nipple. The best I can measure this primer is 0.16" dia instead of the normal 0.19", but this may just be my measuring error.

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Does anyone have an idea what this strange primer is???

Lew

hello
the primer is not mounted “al reverse” ?
look like a berdan primer inserted in wrong sens ,but with much force to completely insert this in his placement

I had not considered this but I guess it is possible! Maybe my “rare & exotic” item turns out to be another manufacturing error!

Do the Dutch make manufacturing errors??? Maybe that is why it is “rare & exotic”.

Thanks,
Lew

hello
i don’t know if ai casing is berdan or boxer primer ?
or maybe berdan but function with boxer primer (no nipple in case primer hole)

It is Berdan primed, as you suspected in your original post.

Lew