Unfortunately, reports are that these are not of good quality, often failing due to metal related issues.
I don't know of anyone that collects these, and doubt there is any distinction or value difference between those with different markings.
We briefly mention these on page 6 of the FAQ.
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![](image.php?u=7734&type=sigpic&dateline=1370651347) Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.
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