Here's is a picture of the official mint set from 2002. The mintage 150,000 matches the BU year line.
I can't find anything on different BU coins without the CM.
Me neither !!!
Clearly, this one has been in circulation for some time. It looks 100% genuine. I've had a look under the best magnification I own (mag x40) and there's no sign of any tampering. When I found it I was simply comparing CM sizes, as per the Numista catalogue page, so you can imagine my surprise. I've currently got it listed under the BU issue, but that's obviously incorrect. That's why it's so strange that no one has found one of these before - the 2002 issue must be regularly checked.
Not sure how a random part of the design could be missing. Any suggestions?