Welcome to the HKpro forum.
You could ALWAYS contact HK USA customer service. They could tell you in a heartbeat.
I know about the .45 that was part of the Anniversary edition from HK. Can't say I have seen a 40 Anniversary, and I kinda collect HK USPC 40 and I would LOVE to know about yours. That would be one I would want to collect in the long run.
Again, welcome to the HK Enablers forum.
Oh, if you plan to hang out a bit more, a one year paid membership is $30. You get extra emails and a few other things like the personalized signature line (see my signature line)