If there are any still available, please shoot me a message, I'd take them!
Sounds like OP got these a while back, which means they are almost assuredly real. Alibaba, of course, sold fakes for some time that look indistinguishable (maybe still do, need to scam hunt on there it’s been a mn).
Woulda been awesome if Casascius had sold me the bag of these he still had listed for sale on his website back in 2015 that I placed an order for (since it was still showing as purchasable) and never heard back. Only $11,000 lost in todays dollars
(Btw I think I’ve got a spare to give you, shoot me a reminder in a few days)
Feel you on the lost coins there. Better not to think too much about it.
Side question regarding the alibaba-fakes: Ist it still possible to distinguish them for an expert? Maybe weight ora closer look with a lense or even microsope?
If that's the case, glad to take you up on your offer @Fortify and get 2 or 3 of these.